In addition to a user login with SASL (nickname + password), the server might be protected by a global server password (PASS). There is currently no way to set that. Should probably be a simple config option called "server-password"
+1 to this feature!
bouncers like ZNC requires sending a "user/server:password" server-password to connect. it's annoying to do this every time on startup.
I believe this is also required for connecting to irccloud's bouncer