localedef.1: New page for localedef(1)

Add new page based on Debian localedef(1) page.

Cowritten-by: Richard Braakman <richard.braakman@jollamobile.com>
Cowritten-by: Alastair McKinstry <mckinstry@computer.org>
Cowritten-by: Lars Wirzenius <liw@iki.fi>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
localedef.1: Replace reference to locale(7) with names of a few relevant functions

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
localedef.1: Minor fixes to new page

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
localedef.1: srcfix: Clean up trailing white space

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>