* cplus-dem.c (cplus_markers): Add table for gnu style and

	* cplus-dem.c (cplus_markers):  Add table for gnu style and
	use throughout, in place of compile time constant CPLUS_MARKER.
	* cplus-dem.c (ARM_VTABLE_STRING, ARM_VTABLE_STRLEN):  Add.
	* cplus-dem.c (cfront_special):  New function, as suggested
	by pfieland@stratus.com.
	* cplus-dem.c (forget_types):  New function.
	* cplus-dem.c (cplus_demangle):  Call gnu_special, moved from
	demangle_prefix().
	* cplus-dem.c (mop_up):  Call forget_types().
	* cplus-dem.c (AUTO_DEMANGLING, GNU_DEMANGLING, LUCID_DEMANGLING):
	Use throughout, instead of checking current_demangling_style.
	* cplus-dem.c (demangle_signature):  When finding an explicit
	start of function args, forget all remembered types for
	lucid/cfront style demangling.
	* cplus-dem.c (demangle_prefix):  In a sequence of two or more
	underbar characters, use last pair as the delimiter.  Hoist
	gnu_special() call up to cplus_demangle().  Call cfront_special()
	when appropriate.
	* cplus-dem.c (cplus_special):  Fix virtual table name demangling
	for inherited classes.
	* cplus-dem.c (demangle_args):  Document quirks of numbered
	references to previously seen types.
	* dbxread.c (read_ofile_symtab, process_one_symbol):
	Use AUTO_DEMANGLING rather than explicitly checking
	current_demangling_style.
	* demangle.h:  Add some comments.
	* demangle.h (AUTO_DEMANGLING, GNU_DEMANGLING, LUCID_DEMANGLING,
	CFRONT_DEMANGLING):  New macros.
	* dwarfread.c (LCC_PRODUCER):  Remove trailing space, which is
	not found in the actual producer string produced by lcc.
	* dwarfread.c (handle_producer):  Use AUTO_DEMANGLING rather
	than explicitly checking current_demangling_style.