SDL to 1.2.15, c-ares to latest 1.10.0 build, Boost to 1.55.0
with coroutine updates/fixes, curl to 7.34.0, libpng to 1.6.8,
openssl to 1.0.1e, zlib to latest 1.2.8 build, llqtwebkit
built from 4.7.1 sources refactored and tested in 3p-llqtwebkit2
repository.

Windows is functional with a good number of warning messages
at runtime from libpng and KDU.  MoaP/slplugin functioning.

In autobuild.xml, specify today's build of the Boost package that includes the
Boost.Context library, and whose boost::dcoroutines library uses Boost.Context
exclusively instead of its previous context-switching underpinnings (source of
the ucontext.h dependency).
Add BOOST_CONTEXT_LIBRARY to Boost.cmake and Copy3rdPartyLibs.cmake. Link it
with the viewer and with the lllogin.cpp test executable.
Track new Boost package convention that our (early, unofficial) Boost.Coroutine
library is now accessed as boost/dcoroutine/etc.h and boost::dcoroutines::etc.
Remove #include <boost/coroutine/coroutine.hpp> from
llviewerprecompiledheaders.h and lllogin.cpp: old rule that Boost.Coroutine
header must be #included before anything else that might use ucontext.h is
gone now that we no longer depend on ucontext.h. In fact remove
-D_XOPEN_SOURCE in 00-Common.cmake because that was inserted specifically to
work around a known problem with the ucontext.h facilities.

while allocating the first easy handle in a descent of the global initiailization
code but that doesn't seem to be a problem on TC machines.  Perhaps the static
linking is creating multiple data copies.  More work needed.

defenses in the delete functions of the allocation support.  General
boost library renaming again.  Linux builds in TC though it shouldn't
based on what Boost.cmake lookes like...

boost::thread and the easiest path to that was to go with the 1.48 Boost release
in the 3P tree (eliminating a fork for a modified 1.45 packaging).  One unit test,
the most important one, is failing in test_httprequest but that can be attended
to later.  This test issues a GET to http://localhost:2/ and that is hitting the
wire but the libcurl plumbing isn't delivering the failure, only the eventual
timeout.  An unexpected change in behavior.

- Added a class implementing directory entries iteration with pattern matching which is used in unit tests instead of LLDir::getNextFileInDir.

STORM-550 FIXED Fixed LLDir unit test which failed for some complex wildcard combinations.

Merge of QAR-1267 to trunk.  This was a combo merge of QAR-1175 (maint-render-9) and QAR-1236 (dll-msvcrt-2)

svn merge -r 109838:112264 svn+ssh://svn.lindenlab.com/svn/linden/branches/maint-render/maint-render-9-merge-r109833

Self-reviewed.

dataserver-is-deprecated
for-fucks-sake-whats-with-these-commit-markers