Update XOAUTH2 documentation.

Google publicly documents XOAUTH2 for POP3 now, so we no longer need the
link to the blog post from 2014.

Replace dangling references to numbered links that are no
longer numbered.

diff --git a/h/oauth.h b/h/oauth.h
index 7aa112c52aab865e2f6ab3d84d902c0dc10592c8..942e375aad942f9cdd020315eba80af384755fa1 100644 (file)
--- a/h/oauth.h
+++ b/h/oauth.h
@@ -4,14 +4,10 @@
  * providers implement XOAUTH2 or some similar OAuth-based SMTP authentication
  * protocol, it should be simple to extend this.
  *
- * OAuth  https://tools.ietf.org/html/rfc6749
- * SMTP   https://developers.google.com/gmail/xoauth2_protocol
- * POP3   http://googleappsdeveloper.blogspot.com/2014/10/updates-on-authentication-for-gmail.html
+ * OAuth        https://tools.ietf.org/html/rfc6749
+ * XOAUTH2      https://developers.google.com/gmail/imap/xoauth2-protocol
  *
- * Presumably [2] should document POP3 and that is an over-sight.  As it stands,
- * that blog post is the closest we have to documentation.
- *
- * According to [1] 2.1 Client Types, this is a "native application", a
+ * According to RFC6749 2.1 Client Types, this is a "native application", a
  * "public" client.
  *
  * To summarize the flow: