* Makefile.in (path-mount.o): Add a rule to build stripped down version

	* Makefile.in (path-mount.o): Add a rule to build stripped down version
	of path.cc for usage in mount.
	(mount.exe): Add dependency to path-mount.o.
	* mount.cc (force): Convert to bool value.  Accommodate throughout.
	(from_fstab): New function.
	(do_mount_from_fstab): New function.
	(longopts): Add --all option.
	(opts): Add -a option.
	(usage): Document -a/--all option.
	(main): Handle -a option as well as single parameter.
	* path.cc: Add FSTAB_ONLY conditional to allow building path-mount.o.
	(mount_table): Remove static storage class.
	(max_mount_entry): Ditto.
	(root_here): Unused.  Remove.
	(from_fstab_line): Remove static.
	* path.h (struct mnt_t): Define here rather than in path.cc.
	(from_fstab_line): Declare.
	(mount_table): Declare.
	(max_mount_entry): Declare.
	* utils.sgml (mount): Document -a/--all option and mounting of single
	path from fstab files.