* psymtab.c (partial_map_expand_apply): Add assertion.

	(partial_map_symtabs_matching_filename): Skip included psymtabs.
	(psymtab_to_symtab): Find unshared psymtab.
	(dump_psymtab): Print including psymtabs.
	(recursively_search_psymtabs): New function.
	(expand_symtabs_matching_via_partial): Use it.
	* psympriv.h (struct partial_symtab) <user, searched_flag>: New
	fields.
	(enum psymtab_search_status): New.