Unquote From line from patch before comparing with given from address.

This makes --suppress-from actually work when you're unfortunate enough
to have non-ASCII in your name.  Also, if there's a match use the optionally
RFC2047 quoted version from the email.

Signed-off-by: Kristian Høgsberg <krh@redhat.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

git-send-email.perl

@@ -561,7 +561,8 @@ foreach my $t (@files) {
 					$subject = $1;
 
 				} elsif (/^(Cc|From):\s+(.*)$/) {
-					if ($2 eq $from) {
+					if (unquote_rfc2047($2) eq $from) {
+						$from = $2;
 						next if ($suppress_from);
 					}
 					elsif ($1 eq 'From') {