A simple script to clean all the relevant sbbs3 build output directories.

Use 'cleanall.sh RELEASE=1' to clean the release output dirs. The deafult
is the DEBUG output dirs otherwise.
This possibly could be made a 'clean' target of the Makefile already in
this directory, but I don't want to deal with recursive make right now.

src/cleanall.sh

+#!/bin/sh
+make -C conio clean $@
+make -C sbbs3 clean $@
+make -C sbbs3/scfg clean $@
+make -C sbbs3/uedit clean $@
+make -C sbbs3/umonitor clean $@
+make -C smblib clean $@
+make -C uifc clean $@
+make -C xpdev clean $@