Support the siteconf feature

Patch to support the siteconf feature, from [w3m-dev 04463]
on 2012-06-27, provided by AIDA Shinra.

history.c

@@ -17,7 +17,7 @@ historyBuffer(Hist *hist)
 	for (item = hist->list->last; item; item = item->prev) {
 	    q = html_quote((char *)item->ptr);
 	    if (DecodeURL)
-		p = html_quote(url_unquote_conv((char *)item->ptr, 0));
+		p = html_quote(url_decode2((char *)item->ptr, NULL));
 	    else
 		p = q;
 	    Strcat_charp(src, "<li><a href=\"");