c-decl.c (start_decl): Unconditionally issue error for 'typedef foo = bar'.

gcc:
	* c-decl.c (start_decl): Unconditionally issue error for
	'typedef foo = bar'.
	(finish_decl): Remove special case for TYPE_DECL with initializer.

	* doc/extend.texi: Delete "Naming Types" section.  Change all
	cross-references to that section to refer to "Typeof" instead.
	Add the useful safe-max()-macro example from "Naming Types" to
	"Typeof", rewritten using that extension.

gcc/cp:
	* decl.c (start_decl): Unconditionally issue error for
	'typedef foo = bar'.
	(cp_finish_decl): Remove special case for TYPE_DECL with initializer.
	(grokdeclarator): Remove redundant error for 'typedef foo = bar'.

gcc/testsuite:
	* g++.dg/ext/typedef-init.C: New test.
	* gcc.dg/typedef-init.c: New test.

From-SVN: r57995