destructuring-bind is a macro in the deprecated package: cl
SPC-TAB calls: spacemacs/alternate-buffer
In the spacemacs-base distribution, it shows the message:
spacemacs/alternate-buffer: Symbol’s function definition is void: destructuring-bind
Also renamed three instances of destructuring-bind in the rirc layer.
The auth-source-search function has an implied :max parameter with value 1. In
the case of connecting to multiple irc servers, only the first line in .authinfo
was applied. Thus, we should pass a value for :max to auth-source-search that is
guaranteed to at least be able to fit all our credentials.