parse categories, add multiple field values support (for categories)

Fields with multiple values are separated by '|'. In the future multiple
enclosure support might be added.

The categories tags are now parsed. This feature is useful for filtering and
categorizing.

Parsing of nested tags such as <author><name> has been improved. This code has
been refactored.

RSS <guid> isPermaLink is now handled differently also and will now prefer a
permalink with "true" (link) over the ID. In practise multiple <guid> in an
item does not happen.

1 files changed, 2 insertions, 1 deletions

diff --git a/util.h b/util.h
index cf250ec..bdd5664 100644
--- a/util.h
+++ b/util.h
@@ -30,7 +30,8 @@ struct uri {
 
 enum {
 	FieldUnixTimestamp = 0, FieldTitle, FieldLink, FieldContent,
-	FieldContentType, FieldId, FieldAuthor, FieldEnclosure, FieldLast
+	FieldContentType, FieldId, FieldAuthor, FieldEnclosure, FieldCategory,
+	FieldLast
 };
 
 int  absuri(char *, size_t, const char *, const char *);