gitweb: Add local time and timezone to git_print_authorship

Add local time (hours and minutes) and local timezone to the output of
git_print_authorship command, used by git_commitdiff.  The code was
taken from git_commit subroutine.

Signed-off-by: Jakub Narebski <jnareb@gmail.com>
Signed-off-by: Junio C Hamano <junkio@cox.net>

gitweb/gitweb.perl

@@ -1358,10 +1358,18 @@ sub git_print_header_div {
 sub git_print_authorship {
 	my $co = shift;
 
-	my %ad = parse_date($co->{'author_epoch'});
+	my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
 	print "<div class=\"author_date\">" .
 	      esc_html($co->{'author_name'}) .
-	      " [$ad{'rfc2822'}]</div>\n";
+	      " [$ad{'rfc2822'}";
+	if ($ad{'hour_local'} < 6) {
+		printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
+		       $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
+	} else {
+		printf(" (%02d:%02d %s)",
+		       $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
+	}
+	print "]</div>\n";
 }
 
 sub git_print_page_path {