boost: fix build error with recent versions of glibc

Original patch is at https://svn.boost.org/trac/boost/changeset/84950

Signed-off-by: Yvan Volochine <yvan.volochine@gmail.com>
class library: plot now draws correct domain spec values
fix outdated svn url in windows readme (thanks @bagong)
Merge pull request #988 from gusano/topic/boost_fix_for_recent_glibc

boost: fix build error with recent versions of glibc
help: queryTree works, so remove note from the helpfile