GitLab

	Ffind_file_name_handler, and make it visible to lisp.  Add a QUIT
	to the loop which scans file-name-handler-alist.  All uses
	changed.
	(syms_of_fileio): Mention this new function in the docstring for
	Vfile_name_handler_alist.  defsubr Sfind_file_name_handler.
	* lisp.h (Ffind_file_name_handler): Added extern declaration.
	* dired.c: All uses of find_file_handler changed here too.