On my system I have a /usr/share/man/man3/memcpy.3posix.gz man page.  It can be
viewed by 'man 3p memcpy', where the section name argument can be any prefix of
the "3posix" segment.  (The Perl man pages on this system use a similar naming
convention, *.3perl.gz)

These patches make 'man 3p memcp<TAB>' work.

_man used $sect as a loop variable, stomping on its previous value.  The first
patch stops stomping on the previous value, but introduces no functional
change.  The second patch uses the unstomped value and fixes the issue.

Cheers,

Daniel