Ifconfig cleanup.
Move xgetpwuid() and xgetgrgid() into xwrap.c
Add xgetpwnam() to lib/xwrap.c.
Oops, cleaned up ifconfig uses atolx_range() instead of get_int_list(). Check that in.
Promote ifconfig from pending to other.
Cleanup help text, remove dead fields unused by linux kernel.
Fix cut.

Some commands went in before "pending", and thus need cleanup but are enabled
in defconfig. The fact cut used a function out of lib/pending.c is a hint
it might be in this category...