* gdb.base/maint.exp: Remove testing of individual maint command
	help output.
	* NEWS: Mention new maintenance commands check-symtabs, and
	expand-symtabs, and renamed check-psymtabs.
	* psymtab.c (maintenance_check_psymtabs): Renamed from
	maintenance_check_symtabs.  Only process already-expanded symbol
	tables.
	(_initialize_psymtab): Update.
	* symmisc.c (maintenance_check_symtabs): New function.
	(maintenance_expand_name_matcher): New function
	(maintenance_expand_file_matcher): New function
	(maintenance_expand_symtabs): New function.
	(_initialize_symmisc): Add "mt check-symtabs" and "mt expand-symtabs"
	commands.

	doc/
	* gdb.texinfo (Maintenance Commands): Update doc for
	"maint check-psymtabs".  Add doc for "maint check-symtabs",
	"maint expand-symtabs".

	testsuite/
	* gdb.base/maint.exp: Update test for "maint check-psymtabs".
	Add tests for "maint check-symtabs", "maint expand-symtabs".