This is the first of the last 3 patches for pending breakpoint support.
This patch adds the actual support.  The other two patches are the
documentation (previously approved, but before code was accepted) and
changes to the testsuite.

This patch accounts for previous comments on the breakpoint code.

Ok to commit?

-- Jeff J.

2004-01-21  Jeff Johnston  <jjohnstn@redhat.com>

        * breakpoint.h (struct breakpoint): Add new flag, from_tty,
        and pending fields for pending breakpoint support.
        * breakpoint.c (breakpoint_enabled): Add check for not pending.
        (condition_command): Only parse condition if not a pending
        breakpoint.
        (print_one_breakpoint): Add support for pending breakpoints.
        (describe_other_breakpoints): Add checks to verify we are not
        dealing with pending breakpoints.
        (check_duplicates): Don't check pending breakpoints.
        (set_raw_breakpoint): Initialize pending flag.
        (do_restore_lang_radix_cleanup): New cleanup routine.
        (resolve_pending_breakpoint): New function.
        (re_enable_breakpoints_in_shlibs): Try and resolve any
        pending breakpoints via resolve_pending_breakpoint.
        (mention): Add pending breakpoint support.
        (parse_breakpoint_sals): Add new parameter to pass to
        decode_line_1 to indicate silent errors when files or functions
        are not found.  Change all callers.
        (do_captured_parse_breakpoint): New function.
        (break_command_1): Catch errors when parsing the breakpoint.
        If a "not found" error occurs, offer to make the breakpoint
        pending on a future shared library load.  Do not parse any
        conditional if breakpoint is pending.
        (delete_breakpoint): Add appropriate check for pending.
        (breakpoint_re_set_one): Ditto.
        (do_enable_breakpoint): Ditto.