ejabberdctl: Escape whitespace in ERL_OPTIONS

If ERL_OPTIONS="-opt arg" is specified, make sure the space character
between "-opt" and "arg" is retained.

Fixes #143.

ejabberdctl.template

@@ -112,6 +112,7 @@ ERL_CRASH_DUMP=$LOGS_DIR/erl_crash_$DATETIME.dump
 ERL_INETRC=$ETC_DIR/inetrc
 
 # define erl parameters
+ERL_OPTIONS=$(echo $ERL_OPTIONS | sed 's/ /\\ /g')
 ERLANG_OPTS="+K $POLL -smp $SMP +P $ERL_PROCESSES $ERL_OPTIONS"
 KERNEL_OPTS=""
 if [ "$FIREWALL_WINDOW" != "" ] ; then