Fix compat with Unreal > 6.1.1.1

The '=' syntax is an ircd-hybrid-ism, and Unreal will drop support for
it in the next release. More specifically, somewhere between
0af88581d380602bfd58a0cdaa36b714fb7ef3c3 and c8c265790494b908ff397c705855a21e591884de
in its Git history.

irctest/controllers/unrealircd.py

@@ -112,7 +112,7 @@ files {{
 }}
 
 oper "operuser" {{
-    password = "operpassword";
+    password "operpassword";
     mask *;
     class clients;
     operclass netadmin;