;; C-c C-s Increment SOA serial.
;; Understands YYYYMMDDNN, Unix time, and serial number formats,
;; and complains if it fail to find SOA serial.
;; C-c C-s Increment SOA serial.
;; Understands YYYYMMDDNN, Unix time, and serial number formats,
;; and complains if it fail to find SOA serial.