* hash.h (hash_table_key): New type.
	(hash_entry): Change `string' field to generic `key'.
	(hash_table): Add `comp' and `hash' functions.
	(hash_table_init): Take them as input.
	(hash_table_init_n): Likewise.
	(hash_lookup): Modify for generic keys.
	(hash_newfunc): Likewise.
	(hash_traverse): Likewise.
	(string_hash): New function.
	(string_compare): Likewise.
	(string_copy): Likewise.
	* hash.c (hash_table_init_n): Modify for generic keys.
	(hash_table_init): Likewise.
	(hash_lookup): Likewise.
	(hash_newfunc): Likewise.
	(hash_traverse): Likewise.
	(string_hash): Split out from hash_lookup.
	(string_compare): New function.
	(string_copy): Split out from hash_lookup.
	* tlink.c (symbol_hash_newfunc): Modify for new interfaces to hash
	tables.
	(symbol_hash_lookup): Likewise.
	(file_hash_newfunc): Likewise.
	(file_hash_lookup): Likewise.
	(demangled_hash_newfunc): Likewise.
	(demangled_hash_lookup): Likewise.
	(tlink_int): Likewise.
	(read_repo_file): Likewise.
	(recompile_files): Likewise.
	(demangle_new_symbols): Likewise.
	(scan_linker_output): Likewise.

From-SVN: r23683