Account for VC8 not having single threaded runtimes. (merge from trunk)

svn path=/branches/RC_1_33_0/boost/tools/build/; revision=30322
A trio of harmless IBM patches from Chris Cambly

svn path=/branches/RC_1_33_0/boost/tools/build/; revision=30338
PDF manual for BBv2

svn path=/branches/RC_1_33_0/boost/tools/build/; revision=30343
fixed broken links

svn path=/branches/RC_1_33_0/boost/tools/build/; revision=30431
changed link to sgi.com

svn path=/branches/RC_1_33_0/boost/tools/build/; revision=30441
Fix a bogus link. Remove all HTML validation warnings.

svn path=/branches/RC_1_33_0/boost/tools/build/; revision=30442
Fix a bogus link.

svn path=/branches/RC_1_33_0/boost/tools/build/; revision=30444
Fix a bogus link.

svn path=/branches/RC_1_33_0/boost/tools/build/; revision=30446
Fix bad 'extends'. Thanks to p.klotz@icoserve.com.

svn path=/branches/RC_1_33_0/boost/tools/build/; revision=30523
kFreeBSD support from Domenico Andreoli

svn path=/branches/RC_1_33_0/boost/tools/build/; revision=30687
Add patch number to version tag as we don't guarantee binary compatibility even for patch releases.

svn path=/branches/RC_1_33_0/boost/tools/build/; revision=30832
QNX Momentics doesn't have/need -pthread.

svn path=/branches/RC_1_33_0/boost/tools/build/; revision=30866
Detect and use QNX QCC (GCC variant) compiler.

svn path=/branches/RC_1_33_0/boost/tools/build/; revision=30867
Oops, it should qcc not QCC for the QNX/Momentics C compiler.

svn path=/branches/RC_1_33_0/boost/tools/build/; revision=30881
"unix" was not getting defined for all variants of QNX, specifically Neutrino, which prevented JAMUNAME from getting set up correctly.

svn path=/branches/RC_1_33_0/boost/tools/build/; revision=30882
Add support for STLport 5.0.

svn path=/branches/RC_1_33_0/boost/tools/build/; revision=30925
Make it so that the MInGW DLLs are found automatically and don't have to be in the path.

svn path=/branches/RC_1_33_0/boost/tools/build/; revision=30949
Ignore stlport-iostream as iostreams are always on in STLport-5.

svn path=/branches/RC_1_33_0/boost/tools/build/; revision=30959
More tweaks for STLport-5 support:
* Handle "g" vs. "d" tags on STLport library names based on the compiler.
* Force multi-threaded builds as STLport-5 only supports that.

svn path=/branches/RC_1_33_0/boost/tools/build/; revision=31000
Factor out the docs for stlport support, to make it consistent across toolsets.

svn path=/branches/RC_1_33_0/boost/tools/build/; revision=31004