FIX Flush on memory exhaustion and headers sent
FIX Include flushtoken when install redirects to successfullyinstalled
FIX Token redirect where in IIS a / needs adding between host & url
FIX Constants magic_quotes handling needs function from Core
Merge pull request #2285 from hafriedlander/fix/flush_30

FIX Flush on memory exhaustion and when headers sent
Merge branch '3.0' into 3.1