docs/70943: remove -k from gdb.1 manual

[Xin LI]

Synopsis: remove -k from gdb.1 manual

Responsible-Changed-From-To: freebsd-doc->marcel
Responsible-Changed-By: delphij
Responsible-Changed-When: Mon Feb 14 16:43:56 GMT 2005
Responsible-Changed-Why: 
Marcel, would you please review the patch here:
	http://people.freebsd.org/~delphij/patch-gdb.1 ?

Thanks in advance!

http://www.freebsd.org/cgi/query-pr.cgi?pr=70943