Use a different port for TLS erc

* lisp/erc/erc.el (erc-default-port-tls): New variable
(bug#19497).
* lisp/erc/erc.el (erc-tls): Use it.

Copyright-paperwork-exempt: yes

2 files changed, 9 insertions, 1 deletions

diff --git a/etc/NEWS b/etc/NEWS
index edd81476c17..20a12329edc 100644
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -376,6 +376,9 @@ hide all messages of the specified type, where `erc-network-hide-list'
 and `erc-channel-hide-list' will only hide the specified message types
 for the respective specified targets.
 
+*** New variable `erc-default-port-tls' used to connect to TLS IRC
+servers.
+
 ** Midnight-mode
 *** `midnight-mode' is a proper minor mode.
 *** clean-buffer-*-regexps can now specify buffers via predicate functions.
diff --git a/lisp/erc/erc.el b/lisp/erc/erc.el
index 8e26db1d9d3..cd8c8a817e1 100644
--- a/lisp/erc/erc.el
+++ b/lisp/erc/erc.el
@@ -1471,6 +1471,10 @@ Defaults to the server buffer."
 (defconst erc-default-port 6667
   "IRC port to use if it cannot be detected otherwise.")
 
+(defconst erc-default-port-tls 6697
+  "IRC port to use for encrypted connections if it cannot be
+  detected otherwise.")
+
 (defcustom erc-join-buffer 'buffer
   "Determines how to display a newly created IRC buffer.
 
@@ -2194,7 +2198,8 @@ be invoked for the values of the other parameters."
 (defun erc-tls (&rest r)
   "Interactively select TLS connection parameters and run ERC.
 Arguments are the same as for `erc'."
-  (interactive (erc-select-read-args))
+  (interactive (let ((erc-default-port erc-default-port-tls))
+                 (erc-select-read-args)))
   (let ((erc-server-connect-function 'erc-open-tls-stream))
     (apply #'erc r)))