doc/IRCD: Add linking information

Author: Xe

doc/IRCD.markdown

@@ -0,0 +1,47 @@
+# IRCd configuration
+
+## Charybdis or Elemental-IRCd
+
+Cod links like any other services server except no `hub_mask` is needed at this 
+time. Cod may also link over SSL. Note that your experience may be better with 
+Elemental-IRCd.
+
+```
+connect "cod.int" {
+	host = "127.0.0.1";
+    send_password = "dev";
+	accept_password = "dev";
+	port = 6667;
+	class = "server";
+};
+
+service {
+    name = "cod.int";
+};
+```
+
+## InspIRCd
+
+Cod requires the same InspIRCd modules that Atheme does. An example 
+configuration for linking InspIRCd to Cod is shown below:
+
+```
+<uline server="cod.int">
+
+<link name="cod.int"
+      ipaddr="localhost"
+      port="7001"
+      allowmask="127.0.0.0/8"
+      sendpass="password"
+      recvpass="password">
+
+#Absolutely required.
+<module name="m_spanningtree.so">
+<module name="m_services_account.so">
+<module name="m_servprotect.so">
+<module name="m_chghost.so">
+
+# Needed for SVSOPER
+<module name="m_svsoper.so">
+```
+