Merging from server-1.26 to trunk

Only a few conflicts:

   scripts/farm_distribute : the upload rate in trunk was even more
                             conservative than the one I switched to in
                             1.26, so kept the trunk version.

   indra/llcommon/llversionserver.h : did svn revert to keep trunk

   indra/newsim/lltask.cpp : svn is weird.  The merge conflict was one
                            that it's not obvious why it was there.
                            However, Simon and I looked at it, and the
                            solution was obvious : keep the trunk blob
                            where the conflict was flagged.

   indra/lib/python : conflict was differing versions of the eventlib
                      extern.  did svn revert . to keep trunk.