Publicize: HTML entities are being encoded when they shouldn't be

#### Steps to reproduce the issue

The user is using FeedWordPress to populate their database with links gathered from a Google alert. They're being saved correctly there, but when the posts are publicized, the links are HTML encoded, which is breaking them.

Examples:
On their site: https://www.google.com/url?rct=j&sa=t&url=http%3A%2F%2Fwww.lanouvelle.net%2FActualites%2F2016-06-18%2Farticle-4564333%2FSe-preparer-a-sauver-des-vies%2F1&ct=ga&cd=CAIyG2JkNjZmZDhmMzhlMDY5MmU6Y2E6ZnI6Q0E6Ug&usg=AFQjCNFrTiFi5XShgmBON15-W_5BDDtv4g

What was publicized: https://www.google.com/url?rct=j&%3Bsa=t&%3Burl=http%3A%2F%2Fwww.lanouvelle.net%2FActualites%2F2016-06-18%2Farticle-4564333%2FSe-preparer-a-sauver-des-vies%2F1&%3Bct=ga&%3Bcd=CAIyG2JkNjZmZDhmMzhlMDY5MmU6Y2E6ZnI6Q0E6Ug&%3Busg=AFQjCNFrTiFi5XShgmBON15-W_5BDDtv4g

2707969-t

Start by reproducing the publicize flow with the FeedWordPress-generated Google Alert URL shown in the issue and compare the source URL with the publicized result. Trace where the URL is transformed during publicization; done means query separators remain usable and are not changed into HTML-encoded output.

Written by the indexing model from the issue text.