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-version 1.5.0:
-2012/08/24
-- (ICPC Linux) updated scripts to create ICPC linux under ubuntu
-   12.04. Hopefully it will still work with older versions of ubuntu.
-- (ICPC Linux) java version now is openjdk6 (it is getting harder to
-   keep using sun java on new linux distributions) 
-- Problems in BOCA are now defined by a problem package in ZIP format,
-   which can be encrypted.
-- private/score.sep file now allows also the specification of by-user
-   and by-site scoretables.
-- admin password need to change other users' passwords.
-- option to import users using the ICPC webpage formats (.tab and .tsv).
-- multi-site re-included in the system, with a centralized idea (one
-   main server and many local servers that connect to it). The
-   connection is done (encryptedly) via http and is handled by a new type of
-   user named type "site". 
-- main site can provide redundancy in case of failure, as it has a
-   copy of everything.
-- autojudging scheme has been improved, specially in terms of
-   safety. Scripts to judge are now inside the problem package.
-- examples of problem packages are included in doc/problemexamples/
-- option to delete and undelete problems included, so one can setup
-   the warmup and contest with all problems, delete some, undelete later.
-- bug fix in updating time of contest and sites (updating contest
-   didn't update sites).
-- options to insert keys and password in the tab contest in order to
-   unlock problems in case they are encrypted.
-- documentation files updated.
-
-version 1.4.2:
-2011/11/04
-- user type site created to allow for pushing of scores from other sites
-- createdb.php moved to private/ for better safety. Option to abort its execution is included.
-- autojudging.php moved to private/ for better safety
-- possibility of multiple scores defined by the private/score.sep file
-- fix of setup.sh and rc.local scripts to properly set firewall rules (thanks Flavio GC Rocha).
-  Also some other minor script changes, such as /etc/network/if-pre-up.d/boca
-- script that creates the bocajail changed to /etc/icpc/createbocajail.sh and some
-  improvements are applied (e.g. use of debootstrap). It should now run smoother on 
-  ubuntu and other debian-like systems.
-- bugfix: general clarification option was not appearing in the list of problems.
-- scripts have been updated to make it easy to replace the use of user 'www-data' by 'apache'.
-- updatescores.sh now accepts full path names for servers. This solves the case where boca
-  is not installed in the default http://SERVER/boca/
-- updatescores.sh now gets all the available information about the score of the other sites, and 
-  the local boca server decides which info shall be put in the score board. This fixes issues with
-  displaying undesired info from other sites, because the responsability is given to local boca.
-- webcast directory for F. D. Moreira's fancy score included in the distro.
-
-version 1.4.1:
-2011/10/10
-- special chars and character encoding included as utf-8 in every page. This shall fix the
-  bug of dealing with special chars.
-- bug fix: max length of clars fixed.
-- bug fix: teams could not download their submitted code.
-- many changes to improve security of safeexec (including possibility of chrooting)
-- changes to improve security of conf.php
-- changes to make php configuration directly on .htaccess file of the boca folder
-- new feature: speed improvement by caching run.php of teams 
-- new feature: speed improvement by caching scores of all users
-- new feature: scores can be read from files, which can be updated from other servers by a script
-- new feature: chief judge is introduced (configured at admin/site.php) and each run has to be
-  judged by two judges. In case of disagreement, chief judge or admin has to act.
-- new feature: judges can submit code to the system (even before the competition is running).
-- new feature: admin and chief judge can open multiple runs to re-judge at once in the same screen.
-- scripts to run code at doc/bits/ updated to cope with new safeexec and possible chrooting
-- directory doc/tools/ moved to tools/
-- directory doc/bits/ reorganized
-- development of install scripts and config files for making ubuntu/xubuntu be ready for running
-  a competition are included in tools/
-- simple html versions of manuals for teams and judges included in doc/html/
-
-version 1.4.0:
-2009/08/31
-- safeexec updated to include option of multiple runs of the same code (e.g. for averaging the time).
-
-version 1.3.2:
-2008/08/31
-- bug fix: div by zero at history of judges (thanks to Marcelo Cezar Pinto).
-- standard encoding changed to UTF8 to facilitate the installation on debian/ubuntu systems.
-- scripts to compile/execute runs changed to user nobody and group nogroup to fix a warning.
-
-version 1.3.1:
-2008/08/19
-- bug fix: filenames with spaces were not properly handled by filewindow.php and filedownload.php
-- delete functions of languages, problems and answers are replaced by nicer versions where the runs
-  are kept in the system (Thanks to Renato Lucindo :).
-- openrun feature now does not make the run completely reopened (the teams keep seeing the already
-  judged results, while the runs are rejudged. If a change is performed, then the new status is seen.
-- autojudging procedure now keeps a copy of input and output files in the local filesystem, so the
-  network and DB accesses are reduced (Thanks to huge files of Wanderley Guimaraes :).
-- bug fix: autojudging was not removing old directories, so that was taking extra space on disk. I
-  do not know if this was a bug or a feature.
-- script makebkp.sh added to connect to BOCA by http and send source files.
-
-version 1.3.0:
-2008/08/12
-- new backup feature. Teams can submit files to the server to keep them there. This is going to
-  replace the network mounted homes of Maratona Linux.
-
-version 1.2.3:
-2007/08/25
-- php tag <? changed to <?php in all files for better compatibility (Thanks to Joel Uchoa).
-
-version 1.2.2:
-2007/08/22
-- bug fix: (Thanks to Fabio D. Moreira) when installing on root directory,
-  global path variables had an extra '/', leading to problems with browsers.
-
-version 1.2.1:
-2007/08/21
-- new md5sum check while importing files in "systems" interface.
-- bug fix: autojudge WHI didnt work. It is still experimental.
-
-version 1.2.0:
-2007/08/20
-- bug fix: tie rule now includes the first accepted run.
-- bug fix: names with spaces would create problems to bash scripts.
-- scoreboard improved. New level (4) has many ideas introduced
-  during ICPC world finals 2007.
-- judge's history now is complete: it has all clars and runs.
-- autojudging and scripts modified so as to send diff outputs to judges.
-- autojudging and related procedures updated to allow automatic
-  judging without human interaction (WHI).
-- documentation updated to agree with system improvements.
-
-version 1.1.2:
-2006/09/16
-- bug fix: extra empty line removed when donwloading files.
-
-version 1.1.1:
-2006/08/21
-- bug fix: wrong variable name in DBUpdateTask.
-- bug fix: admin calls DBChiefUpdateTask instead of DBUpdateTask.
-- bug fix: send only one balloon per problem.
-- textarea for showing clarifications.
-
-version 1.1.0:
-2006/07/31
-- documentation atualization.
-- new problem attributes: color and colorname.
-- new balloon images and graphics.
-- new feature to stop and start the contest several times.
-- report page implementation.
-- new feature to order runs (on admin's interface) as desired.
-- new feature to order clarifications (on admin's interface) as desired.
-- new feature to order tasks (on admin's interface) as desired.
-- html tag <pre></pre> defined for showing clarifications.
-- bug fix: some http headers could not be sent because of misplaced 
-  output buffering. This was implying in some "session expired" messages.
-
-version 1.0.6:
-2005/09/04
-- bug fix: special characters in problem names.
-
-version 1.0.5:
-2004/10/06
-- included timelimit field for problems.
-
-version 1.0.4:
-2004/08/19
-- bug fix: in the task window, the file to print was unavailable.
-- new button to view the file before printing.
-- Pascal (Free Pascal Compiler) included in the run.sh example.
-- run.sh improved to better detect errors
-- autojudging small text changes
-
-version 1.0.3:
-2004/06/18
-- bug fix: incorrect report of new balloons to staff.
-- documentation changes concerning autojugding.
-- changes on limit clauses for compatibility with postgres 7.1.x/php 4.1.x.
-
-version 1.0.2:
-2004/06/05
-- bug fix: problem to drop the database when it does not exist.
-- bug fix: duplicating new contests using mozilla browser.
-- changes on file permissions inside the tarball.
-
-version 1.0.1:
-2004/05/09
-- first public release. In 2003, boca 0.5 was used.