Fixed building XML dynamic schemas

Ignore-this: e1099efb6f8acac54a9ae7d5a19f5e94

If path is not fully specified fails on Windows

darcs-hash:20120918085618-56b4d-f734529568d4efb6f0d1b4d4965c66ec2aeef4f6
Fixed sending extra headers when unsubscribing

Ignore-this: e1d80dcdeaf19f5c2746828e48cff240

darcs-hash:20120921105025-56b4d-269ca4876cc5c99b035e037fb720b3e872e2b7bf