gnus-server-add-server).
gnus-server-edit-server).
gnus-server-read-server).
gnus-server-exit).
gnus-server-kill-server).
gnus-server-yank-server).
gnus-server-copy-server).
gnus-server-list-servers).
gnus-server-scan-server). This is mainly sensible with mail
servers.
gnus-server-regenerate-server). This can be useful if you have
a mail back end that has gotten out of sync.
gnus-server-compact-server). Currently implemented only in
nnml (see Mail Spool). This removes gaps between article numbers,
hence getting a correct total article count.