allow breakpoints to be removed by specifying url and line number, for cases where we don't know the crossfire handle of a breakpoint
allow breakpoints to be removed by specifying url and line number, for cases where we don't know the crossfire handle of a breakpoint

http://code.google.com/p/fbug/source/detail?r=6713

mrennie/crossfire,mrennie/crossfire,mrennie/crossfire