MEDIUM: stats: proxied stats admin forms fix

Patch for not using relative URLs for admin forms. This allows proxied instances
of the stats admin interface to continue to function, as the default FORM
action is to submit to the current URL.
diff --git a/src/dumpstats.c b/src/dumpstats.c
index 56512e7..0e87f09 100644
--- a/src/dumpstats.c
+++ b/src/dumpstats.c
@@ -3630,11 +3630,7 @@
 		}
 
 		chunk_appendf(&trash,
-			      "<form action=\"%s%s%s%s\" method=\"post\">",
-			      uri->uri_prefix,
-			      (appctx->ctx.stats.flags & STAT_HIDE_DOWN) ? ";up" : "",
-			      (appctx->ctx.stats.flags & STAT_NO_REFRESH) ? ";norefresh" : "",
-			      scope_txt);
+			      "<form method=\"post\">");
 	}
 
 	/* print a new table */
@@ -4138,10 +4134,7 @@
 	scope_txt[appctx->ctx.stats.scope_len] = '\0';
 
 	chunk_appendf(&trash,
-		      "<li><form method=\"GET\" action=\"%s%s%s\">Scope : <input value=\"%s\" name=\"" STAT_SCOPE_INPUT_NAME "\" size=\"8\" maxlength=\"%d\" tabindex=\"1\"/></form>\n",
-		      uri->uri_prefix,
-		      (appctx->ctx.stats.flags & STAT_HIDE_DOWN) ? ";up" : "",
-		      (appctx->ctx.stats.flags & STAT_NO_REFRESH) ? ";norefresh" : "",
+		      "<li><form method=\"GET\">Scope : <input value=\"%s\" name=\"" STAT_SCOPE_INPUT_NAME "\" size=\"8\" maxlength=\"%d\" tabindex=\"1\"/></form>\n",
 		      (appctx->ctx.stats.scope_len > 0) ? scope_txt : "",
 		      STAT_SCOPE_TXT_MAXLEN);