* intl/gettextP.h (struct loaded_domain): Add conv element.
* intl/dcgettext.c (find_msg): Rename to _nl_find_msg and make public.
Instead of returning found message directly convert it using iconv
if a conversion was found when opening the file.
* intl/loadinfo.h: Protect against multiple inclusion.
Declare _nl_find_msg.
* intl/loadmsgcat.c (_nl_load_domain): Try to determine charset used
in the message file and if necessary find approrpiate
conversion to match currently selected charset.