propagate signals

send signals received by syslogize to the wrapped program.  this way we
can treat syslogize as we treated the program itself.

syslogize.sh

@@ -17,4 +17,15 @@ if test $# -eq 0 ; then
   exit 1
 fi
 
-$@ 2>&1 | logger ${LOGGER}
+propagate_signal () {
+  logger ${LOGGER} "Received $1 signal"
+  jobs -p | xargs kill -$1 
+}
+
+for signal in HUP INT QUIT USR1 USR2 TERM; do
+  trap "propagate_signal ${signal}" ${signal}
+done
+
+$@ 2>&1 | logger ${LOGGER} &
+
+wait $!