Add new input keyword "all" for dbclear to remove all breakpoints. * debug.cc (Fdbclear): Re-write docstring. Check for a single string argument equal to "all" and call remove_all_breakpoints if found. * debug.cc (bp_table::do_remove_all_breakpoints): Re-write loop over all breakpoints to handle the case that the iterator will be invalidated by the removal of the breakpoints.

gnulib-hg = gnulib-hg