* symtab.c (do_free_search_symbols_cleanup): Change arg to,

	* symtab.c (do_free_search_symbols_cleanup): Change arg to,
	effectively, struct symbol_search **.
	(make_cleanup_free_search_symbols): Change arg to struct
	symbol_search **.  All callers updated.
	(compare_search_syms): Compare symtab file name and block as well.
	(search_symbols_equal): New function.
	(sort_search_symbols_remove_dups): Renamed from sort_search_symbols.
	New args new_head, new_tail.  Result is now void.  Remove dups after
	sorting the symbols.
	(search_symbols): Sort all found symbols once, after all have been
	found, and remove duplicates.  Simplify cleanup tracking of result.
	* symtab.h (make_cleanup_free_search_symbols): Update prototype.