Merge branch 'dl/am-hg-locale' into maint

"git am" did not parse datestamp correctly from Hg generated patch,
when it is run in a locale outside C (or en)

* dl/am-hg-locale:
  am: invoke perl's strftime in C locale

git-am.sh

@@ -334,7 +334,7 @@ split_patches () {
 			# Since we cannot guarantee that the commit message is in
 			# git-friendly format, we put no Subject: line and just consume
 			# all of the message as the body
-			perl -M'POSIX qw(strftime)' -ne 'BEGIN { $subject = 0 }
+			LANG=C LC_ALL=C perl -M'POSIX qw(strftime)' -ne 'BEGIN { $subject = 0 }
 				if ($subject) { print ; }
 				elsif (/^\# User /) { s/\# User/From:/ ; print ; }
 				elsif (/^\# Date /) {