Configurable IRC port

src/freedombone

 CONFIGURATION_FILE="freedombone.cfg"
 
 SSH_PORT=2222
+IRC_PORT=6697
 
 # parameters used when adding a new domain
 DDNS_PROVIDER="default@freedns.afraid.org"
   fi
 
   if [ -f $CONFIGURATION_FILE ]; then
+      if grep -q "IRC_PORT" $CONFIGURATION_FILE; then
+          IRC_PORT=$(grep "IRC_PORT" $CONFIGURATION_FILE | awk -F '=' '{print $2}')
+      fi
       if grep -q "WIFI_CHANNEL" $CONFIGURATION_FILE; then
           WIFI_CHANNEL=$(grep "WIFI_CHANNEL" $CONFIGURATION_FILE | awk -F '=' '{print $2}')
       fi
   echo '<name replace-wildcards="yes">%h IRC</name>' >> /etc/avahi/services/irc.service
   echo '<service>' >> /etc/avahi/services/irc.service
   echo '<type>_irc._tcp</type>' >> /etc/avahi/services/irc.service
-  echo "<port>6697</port>" >> /etc/avahi/services/irc.service
+  echo "<port>$IRC_PORT</port>" >> /etc/avahi/services/irc.service
   echo '</service>' >> /etc/avahi/services/irc.service
   echo '</service-group>' >> /etc/avahi/services/irc.service
 
       # docker does its own firewalling
       return
   fi
-  iptables -A INPUT -i eth0 -p tcp --dport 6697  -j ACCEPT
-  iptables -I INPUT -i eth0 -p tcp --dport 1024:65535 --sport 6697 -j ACCEPT
+  iptables -A INPUT -i eth0 -p tcp --dport $IRC_PORT  -j ACCEPT
+  iptables -I INPUT -i eth0 -p tcp --dport 1024:65535 --sport $IRC_PORT -j ACCEPT
   iptables -A INPUT -i eth0 -p tcp --dport 9999 -j ACCEPT
   save_firewall_settings
   echo 'configure_firewall_for_irc' >> $COMPLETION_FILE
   sed -i 's|;CertFile = /etc/ssl/certs/server.crt|CertFile = /etc/ssl/certs/ngircd.crt|g' /etc/ngircd/ngircd.conf
   sed -i 's|;DHFile = /etc/ngircd/dhparams.pem|DHFile = /etc/ssl/certs/ngircd.dhparam|g' /etc/ngircd/ngircd.conf
   sed -i 's|;KeyFile = /etc/ssl/private/server.key|KeyFile = /etc/ssl/private/ngircd.key|g' /etc/ngircd/ngircd.conf
-  sed -i 's/;Ports = 6697, 9999/Ports = 6697, 9999/g' /etc/ngircd/ngircd.conf
+  sed -i "s/;Ports =.*/Ports = $IRC_PORT, 9999/g" /etc/ngircd/ngircd.conf
   sed -i 's/;Name = #ngircd/Name = #freedombone/g' /etc/ngircd/ngircd.conf
   sed -i 's/;Topic = Our ngircd testing channel/Topic = Freedombone chat channel/g' /etc/ngircd/ngircd.conf
   sed -i 's/;MaxUsers = 23/MaxUsers = 23/g' /etc/ngircd/ngircd.conf
       echo '==========' >> /home/$MY_USERNAME/README
       echo 'To connect to your IRC server in irssi:' >> /home/$MY_USERNAME/README
       echo '' >> /home/$MY_USERNAME/README
-      echo "  /server add -auto -ssl $DEFAULTDOMAIN 6697" >> /home/$MY_USERNAME/README
+      echo "  /server add -auto -ssl $DEFAULTDOMAIN $IRC_PORT" >> /home/$MY_USERNAME/README
       echo "  /connect $DEFAULT_DOMAIN_NAME" >> /home/$MY_USERNAME/README
       echo '  /join #freedombone' >> /home/$MY_USERNAME/README
       chown $MY_USERNAME:$MY_USERNAME /home/$MY_USERNAME/README