* app.c (do_scrub_begin): Let line_comment_chars override

	comment_chars.
	(do_scrub_next_char): If a line comment character is not at the
	start of a line, treat it as a comment character if it is one.
	For a CPP line comment use pseudo-op .appline rather than .line.
	* input-scrub.c (logical_input_line): Make int rather than
	unsigned.
	(input_scrub_push, input_scrub_begin): Initialize
	logical_input_line to -1 rather than 0.
	(bump_line_counters): Increment logical_input_line.
	(new_logical_line): If line_number is -2, decrement
	logical_input_line.
	(as_where): Use logical_input_line even if it is 0.
	* read.h (s_app_file prototype): Now takes an int argument.
	* read.c (potable): Make .appfile call s_app_file with 1.  New
	.appline pseudo-op calls s_app_line.
	(s_app_file): If .appfile, call new_logical_line with -2 to
	account for newline inserted by do_scrub_next_char.  If listing,
	call listing_source_file.
	(s_app_line): New function to handle fake pseudo-op .appline.
	* config/obj-coff.c (obj_pseudo_table): Make .appline call
	obj_coff_ln.
	(obj_coff_ln): Added argument to indicate whether .appline.
	* config/obj-coffbfd.c (obj_pseudo_table): Make .appline call
	obj_coff_ln.
	(obj_coff_ln): Added argument to indicate whether .appline.
	* config/tc-mips.c (s_file): Pass argument to s_app_file.

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