pkg/kamailio: Fixed systemd unit failure on server boot

pkg/kamailio/centos/7/kamailio.service

@@ -1,6 +1,8 @@
 [Unit]
 Description=Kamailio (OpenSER) - the Open Source SIP Server
-After=network.target
+Documentation=man:kamailio(8) https://www.kamailio.org/
+Wants=network-online.target
+After=network-online.target
 
 [Service]
 Type=forking

pkg/kamailio/fedora/17/kamailio.service

@@ -1,6 +1,8 @@
 [Unit]
 Description=Kamailio (OpenSER) - the Open Source SIP Server
-After=syslog.target network.target
+Documentation=man:kamailio(8) https://www.kamailio.org/
+Wants=network-online.target
+After=syslog.target network-online.target
 
 [Service]
 Type=forking