Add support for repo.commit-filter and repo.source-filter

These options can be used to override the default commit- and source-
filter settings per repository.

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

ui-tree.c

@@ -22,12 +22,12 @@ static void print_text_buffer(const char *name, char *buf, unsigned long size)
 		"<a class='no' id='n%1$d' name='n%1$d' href='#n%1$d'>%1$d</a>\n";
 
 	html("<table summary='blob content' class='blob'>\n");
-	if (ctx.cfg.source_filter) {
+	if (ctx.repo->source_filter) {
 		html("<tr><td class='lines'><pre><code>");
-		ctx.cfg.source_filter->argv[1] = xstrdup(name);
-		cgit_open_filter(ctx.cfg.source_filter);
+		ctx.repo->source_filter->argv[1] = xstrdup(name);
+		cgit_open_filter(ctx.repo->source_filter);
 		write(STDOUT_FILENO, buf, size);
-		cgit_close_filter(ctx.cfg.source_filter);
+		cgit_close_filter(ctx.repo->source_filter);
 		html("</code></pre></td></tr></table>\n");
 		return;
 	}