Manual test suite: add missing info.

I'm tired to have to find this out by trial and error every time
I perform these tests.

wiki/src/contribute/release_process/test.mdwn

@@ -140,11 +140,11 @@ tracked by tickets prefixed with `todo/test_suite:`.
 # Thunderbird
 
 * Check mail over IMAP using:
-  - a hidden service IMAP server (e.g. Riseup, zsolxunfmbfuq7wf.onion with SSL).
+  - a hidden service IMAP server (e.g. Riseup, zsolxunfmbfuq7wf.onion on port 993 with SSL).
 * Check mail over POP using:
-  - a hidden service POP server (see above).
+  - a hidden service POP server (see above, on port 995 with SSL).
 * Send an email using:
-  - a hidden service SMTP server (see above).
+  - a hidden service SMTP server (see above, on port 465 with SSL).
 
 * Check that the profile works and is torified:
   1. Send an email using Thunderbird and a non-anonymizing SMTP relay (a