Add support for `delset' directive.
Add support for single message deletion.
Miscellaneous comment and layout improvements.
Avoid attempt to read input again, after EOF detected.
Avoid calling `iconv' with unintialised codeset converter.
Provide more robust handling of possibly incomplete LC_MESSAGES macro expansions, when parsing NLSPATH.
* catopen.c (mc_open): Catch unopened file; return failed status.
* mcsource.c (mc_source): Kill MSGTEXT state, after NL at EOF.
Initial import of catgets module.