Document nnimap-shell-program

* lisp/gnus/nnimap.el (nnimap-shell-program): Document
nnimap-shell-program (bug#20651).

1 files changed, 5 insertions, 1 deletions

diff --git a/lisp/gnus/nnimap.el b/lisp/gnus/nnimap.el
index 700e86a0c57..5d38924b576 100644
--- a/lisp/gnus/nnimap.el
+++ b/lisp/gnus/nnimap.el
@@ -67,7 +67,11 @@ back on `network'.")
                                  (if (listp imap-shell-program)
                                      (car imap-shell-program)
                                    imap-shell-program)
-                               "ssh %s imapd"))
+                               "ssh %s imapd")
+  "What command to execute to connect to an IMAP server.
+This will only be used if the connection type is `shell'.  See
+the `make-network-process' documentation for an explanation of
+the format.)
 
 (defvoo nnimap-inbox nil
   "The mail box where incoming mail arrives and should be split out of.