Fix building on OpenBSD due to lack of sys/ucontext.h header.
Patch by brad@comstyle.com. This closes ticket:3917.
More specific matching.
Build a local, up to date, copy of the docs if possible.
Fix build warning
qtscript: Add parameter checking for buildings that do not exist. Fix one such error in semperfi.js.
Get rid of an unnecessary addition from f910611e.
Merge remote-tracking branch 'origin/bugfixes' into 3.1