FeedHQ special feeds probably don't work with self-hosted instances

[Minoru]

In src/feedhqurlreader.cpp Line 22-28 the urls for the "people you follow", "starred items", and "shared items" feeds I mentioned earlier are hardcoded to the feedhq.org url:

#define BROADCAST_FRIENDS_URL                                    \
	"http://feedhq.org/reader/atom/user/-/state/com.google/" \
	"broadcast-friends"
#define STARRED_ITEMS_URL \
	"http://feedhq.org/reader/atom/user/-/state/com.google/starred"
#define SHARED_ITEMS_URL \
	"http://feedhq.org/reader/atom/user/-/state/com.google/broadcast"

In my freshrss code I've removed the domain part and used cfg->get_configvalue("freshrss-url") + STARRED_ITEMS_URL, though I don't know if that's the safe way to do it.

Originally posted by @PetraOleum in #1544 (comment)