backslash for grep

src/freedombone-app-xmpp

@@ -827,7 +827,7 @@ function upgrade_xmpp {
         # because there are no prompts to accept
         # self-signed certs
         xmpp_tls_enabled='-- '
-        xmpp_str="${xmpp_tls_enabled}\"tls\""
+        xmpp_str="\-\- \"tls\""
         if ! grep -q "$xmpp_str" /etc/prosody/conf.avail/xmpp.cfg.lua; then
             sed -i "s|\"tls\"|${xmpp_tls_enabled}\"tls\"|g" /etc/prosody/conf.avail/xmpp.cfg.lua
             xmpp_restart=1