EZP-22969: create object link for new URL
EZP-22969: fixed RichText: only link URL if it already exists
EZP-22969: fixed inserting/linking same URL multiple times
EZP-22969: XmlText: fixed not linking existing URLs
EZP-22969: XmlText: fixed inserting/linking same URL multiple times
Merge pull request #890 from ezsystems/fix-EZP-22969-richtext-url

Fix EZP-22969: Updating Content with RichText adds entry to ezurl, but not to ezurl_object_link