Uses jvb config file from the new location. Fixes a problem where reconfiguring can break package installation due to missing jvb config file.

debian/jitsi-meet.postinst

     configure)
 
         JVB_ETC_CONFIG="/etc/jitsi/videobridge/config"
-        JVB_CONFIG="/usr/share/jitsi-videobridge/.sip-communicator/sip-communicator.properties"
 
         . $JVB_ETC_CONFIG
 
 
         # this is new install let's configure jvb to serve meet
         if [[ -z $FORCE_NGINX && ( -z $JVB_HOSTNAME_OLD || "$JVB_SERVE" = "true" ) ]] ; then
+
+            JVB_CONFIG="/etc/jitsi/videobridge/sip-communicator.properties"
+
             # this is a reconfigure, lets just delete old links
             if [ "$RECONFIGURING" = "true" ] ; then
                 rm -f $JVB_CONFIG
             fi
 
+            # we will write to the file if missing create it
+            if [ ! -f $JVB_CONFIG ] ; then
+                touch $JVB_CONFIG
+            fi
+
             # configure jvb
             echo "AUTHBIND=yes" >> $JVB_ETC_CONFIG
             sed -i "s/JVB_OPTS=.*/JVB_OPTS=--apis=rest,xmpp/g" $JVB_ETC_CONFIG