improve comment, see #2737

git-svn-id: http://svn.wildfiregames.com/public/ps/trunk@15660 3db68df2-c116-0410-a063-a993310a9797
fixes some non-working techs (was in reverted r15644)

git-svn-id: http://svn.wildfiregames.com/public/ps/trunk@15661 3db68df2-c116-0410-a063-a993310a9797
Automated build.

git-svn-id: http://svn.wildfiregames.com/public/ps/trunk@15662 3db68df2-c116-0410-a063-a993310a9797
Merge 'remotes/trunk'