[PATCH v2 1/3] git-send-email(1): improve smtp-encryption docs

[Drew DeVault <sir@cmpwn.com>]

This clarifies the meaning of the 'ssl' and 'tls' values for this
option, which respectively enable SSL/TLS, i.e. a standard "modern" SSL
approach; and STARTTLS, i.e. opportunistic in-band TLS.

Signed-off-by: Drew DeVault <sir@cmpwn.com>
---
 Documentation/git-send-email.txt | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/Documentation/git-send-email.txt b/Documentation/git-send-email.txt
index 93708aefea..c17c3b400a 100644
--- a/Documentation/git-send-email.txt
+++ b/Documentation/git-send-email.txt
@@ -168,8 +168,11 @@ Sending
 	unspecified, choosing the envelope sender is left to your MTA.
 
 --smtp-encryption=<encryption>::
-	Specify the encryption to use, either 'ssl' or 'tls'.  Any other
-	value reverts to plain SMTP.  Default is the value of
+	Specify the encryption to use, either 'ssl' or 'tls'. 'ssl' enables
+	generic SSL/TLS support and is typically used on port 465.  'tls'
+	enables in-band STARTTLS support and is typically used on port 25 or
+	587.  Use whichever option is recommended by your mail provider.  Any
+	other value reverts to plain SMTP.  Default is the value of
 	`sendemail.smtpEncryption`.
 
 --smtp-domain=<FQDN>::
-- 
2.31.1