mysite 5.x-3.0rc1

Bug fixes.

-- #219019. Feed include can produce an error if the admin is trying to add a feed.
-- #218777 by IceCeamYou. Enabling the MySite cache can cause an empty array to be passed if the user has no MySite page content.
-- Changes output message when no content exists. Message is now sensitive
to who the user is.
-- Corrects an issue where users with the View permission but not the Edit
permission are given the wrong error message.
-- #215095 by gustav. Fixes JavaScript failure on IE for mysite_links.
-- #217543 fixes bug in generating add/remove content links.
-- #213336. Static variable caching in mysite_get() caused redirect failures for users trying to create new MySite accounts.