Cleaned up the mess that was the treatment of "below main" functions such as
'__libc_start_main', in Massif, m_debuginfo and m_stacktrace.  As part of
this, --show-below-main is now visible to tools, and Massif pays attention
to it.

Improved the description of --show-below-main=yes in the manual.

Replaced some instances of "__libc_start_main" in the test *.exp files with
"(below main)", which is what will actually be seen.  Also updated
scalar.stderr.exp*, which should make it get closer to actually passing.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@9131 a5019735-40e9-0310-863c-91ae7b9d1cf9
21 files changed