* nis/nis_defaults.c (searchXYX): New functions. Used by both

* nis/nis_defaults.c (searchXYX): New functions.  Used by both

	searchgroup and searchowner.  Significantly simplified.
	(__nis_default_owner): Remove duplication.  Do not locally copy the
	string before duplicating it.
	(__nis_default_group): Likewise.

	* nis/nis_lookup.c (nis_lookup): After calling nis_free_directory,
	we must clear the variable before calling __nisfind_server.

	* nis/nis_lookup.c (nis_lookup): Always free memory allocated with
	nis_getnames.  [Coverity CID 223]

	* locale/programs/locfile.c (locfile_read): Use alloca instead of
	xmalloc to allocate local repertoire name.  [Coverity CID 222]

	* iconv/iconv_charmap.c (use_to_charmap): No need to dynamically
	allocate memory for the input to add_bytes.  [Coverity CID 221]

	was allocated here.  [Coverity CID 219, 220]