[docs] Mention PYTHONFAULTHANDLER in the man page (issue 24459)

[berker.peksag at gmail.com]

http://bugs.python.org/review/24459/diff/17478/Misc/python.man
File Misc/python.man (right):

http://bugs.python.org/review/24459/diff/17478/Misc/python.man#newcode434
Misc/python.man:434: Set the Python memory allocators and/or install
debug hooks.
I think we can make the PYTHONMALLOC documention a bit shorter.

Detailed descriptions of memory allocations and debug hooks can be
removed. It would more than enough to just say "these are the available
memory allocatos and those are the available debug hooks". If people
need more more information about what pymalloc or malloc_debug does they
should read the online documentation.

http://bugs.python.org/review/24459/diff/17478/Misc/python.man#newcode454
Misc/python.man:454: When Python is compiled in release mode, the
default is "pymalloc". When
This paragraph can stay.

http://bugs.python.org/review/24459/diff/17478/Misc/python.man#newcode458
Misc/python.man:458: If Python is configured without "pymalloc" support,
"pymalloc" and
This paragraph can stay.

http://bugs.python.org/review/24459/diff/17478/Misc/python.man#newcode469
Misc/python.man:469: This variable is ignored if the PYTHONMALLOC
environment variable
$PYTHONMALLOC

http://bugs.python.org/review/24459/diff/17478/Misc/python.man#newcode479
Misc/python.man:479: stored in a traceback of a trace. For example,
"PYTHONTRACEMALLOC=1"
.IB PYTHONTRACEMALLOC=1

http://bugs.python.org/review/24459/diff/17478/Misc/python.man#newcode481
Misc/python.man:481: .IR tracemalloc.start()
I think this is missing "documentation" here.

http://bugs.python.org/review/24459/diff/17478/Misc/python.man#newcode488
Misc/python.man:488: dump the Python traceback. This is equivalent to -X
"faulthandler" option.
Move "This is equivalent ..." part to a new paragraph.

http://bugs.python.org/review/24459/diff/17478/Misc/python.man#newcode490
Misc/python.man:490: If this environment variable is set, "sys.argv[0]"
will be set to its value instead of the value got through the C runtime.
Only works on Mac OS X.
.IB sys.argv[0}

http://bugs.python.org/review/24459/diff/17478/Misc/python.man#newcode490
Misc/python.man:490: If this environment variable is set, "sys.argv[0]"
will be set to its value instead of the value got through the C runtime.
Only works on Mac OS X.
Please also wrap these long lines.

http://bugs.python.org/review/24459/diff/17478/Misc/python.man#newcode493
Misc/python.man:493: Setting these variables only has an effect in a
debug build of Python, that is, if Python was configured with the
--with-pydebug build option.
fB\--with-pydebug\fP

http://bugs.python.org/review/24459/