[geary: 5/6] Add to docs for the IMAP CREATE command.

[Michael Gratton <mjog src gnome org>]

commit fd91eee46d973512ec2c273d2a6063704b923162
Author: Michael James Gratton <mike vee net>
Date:   Sat Dec 2 00:56:06 2017 +1100

    Add to docs for the IMAP CREATE command.

 src/engine/imap/command/imap-create-command.vala |   10 ++++++++--
 1 files changed, 8 insertions(+), 2 deletions(-)
---
diff --git a/src/engine/imap/command/imap-create-command.vala 
b/src/engine/imap/command/imap-create-command.vala
index f09d8bc..e235faa 100644
--- a/src/engine/imap/command/imap-create-command.vala
+++ b/src/engine/imap/command/imap-create-command.vala
@@ -7,10 +7,16 @@
  */
 
 /**
- * See [[http://tools.ietf.org/html/rfc3501#section-6.3.3]]
+ * The IMAP CREATE command.
+ *
+ * This command also supports the RFC 6154 Special-Use CREATE
+ * extension.
+ *
+ * See [[http://tools.ietf.org/html/rfc3501#section-6.3.3]] and
+ * [[https://tools.ietf.org/html/rfc6154#section-3]]
  */
-
 public class Geary.Imap.CreateCommand : Command {
+
     public const string NAME = "create";
     public const string USE = "use";