When base64-decoding part of decrypted text, save the decoding

  permanently if we save the decryption permanently.

(rmail-epa-decode): Take arguments BEG and BACK-FROM-END to designate region.
(rmail-epa-decrypt-1): Call rmail-epa-decode from here, when decrypting one
encrypted passage.
(rmail-epa-decrypt): Not from here.
1 job for master in 1 minute and 24 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Normal
passed #62165
test-lisp-mail-inotify

00:01:24