Merge branch 'sa/send-email-dedup-some-headers'

When fed input that already has In-Reply-To: and/or References:
headers and told to add the same information, "git send-email"
added these headers separately, instead of appending to an existing
one, which is a violation of the RFC.  This has been corrected.

* sa/send-email-dedup-some-headers:
  send-email: avoid duplicate In-Reply-To/References

1 files changed, 6 insertions, 1 deletions

diff --git a/git-send-email.perl b/git-send-email.perl
index 2fa7818ca9..7157397fd0 100755
--- a/git-send-email.perl
+++ b/git-send-email.perl
@@ -1642,10 +1642,15 @@ foreach my $t (@files) {
 			elsif (/^Content-Transfer-Encoding: (.*)/i) {
 				$xfer_encoding = $1 if not defined $xfer_encoding;
 			}
+			elsif (/^In-Reply-To: (.*)/i) {
+				$in_reply_to = $1;
+			}
+			elsif (/^References: (.*)/i) {
+				$references = $1;
+			}
 			elsif (!/^Date:\s/i && /^[-A-Za-z]+:\s+\S/) {
 				push @xh, $_;
 			}
-
 		} else {
 			# In the traditional
 			# "send lots of email" format,