Check role delegated uses HEAD not GET

Fix a typo where the doc said to use the GET operation to check
if role is delegated by a trust rather than HEAD.

Change-Id: I6d763cb4569968d849fec2a1963d6434cf3d2ac4
Remove unexplained/unimplemented Location headers (bug 1182681)

Change-Id: I8d46077f48a7516c0f0514c6a36958e29dc0d374
Fixes mispellings of Endpoint

Change-Id: I334307f4d83d8f0c719ac76b2c19e9c8e89e1815
Fixes: Bug #1185506
Merge "Check role delegated uses HEAD not GET"
Merge "Remove unexplained/unimplemented Location headers (bug 1182681)"