sfeed_update/sfeedrc: add url as parameter to the filter() and order() function

This might make it easier to set filters or ordering by pattern matching on a
group of feeds by the feed URL. For example youtube or reddit feeds.

Another way which was already possible is prefixing names with for example:
"reddit somename" or "yt somename".

1 files changed, 1 insertions, 1 deletions

diff --git a/README b/README
index fbe40b6..d128360 100644
--- a/README
+++ b/README
@@ -336,7 +336,7 @@ filtering items per feed. It can be used to shorten URLs, filter away
 advertisements, strip tracking parameters and more.
 
 	# filter fields.
-	# filter(name)
+	# filter(name, url)
 	filter() {
 		case "$1" in
 		"tweakers")