So I set a password, it consists of 4 sequences of ABCDEFGHIJKLMNOPQRSTUVWXYZ.
I have verified that it is set in servlist_.conf :
Now this is the actual raw command that is sent to the server:
<< PASS ABCDEFGHIJKLMNOPQRSTUVWXYZABCDEFGHIJKLMNOPQRSTUVWXYZABCDEFGHIJKLMNOPQRSTUVWXYZABCDEFG
XChat Version 2.8.8 on UNIX has sent an 85 character password instead of the 104 character password.
According to RFC 2813 there is no such limit on the password command: https://https://tools.ietf.org/html/rfc2813#page-8