gitweb: vertically centre contents of page footer

Signed-off-by: Tony Finch <dot@dotat.at>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

gitweb/static/gitweb.css

@@ -68,12 +68,13 @@ div.page_path {
 }
 
 div.page_footer {
-	height: 17px;
+	height: 22px;
 	padding: 4px 8px;
 	background-color: #d9d8d1;
 }
 
 div.page_footer_text {
+	line-height: 22px;
 	float: left;
 	color: #555555;
 	font-style: italic;