add osapi_compute_unique_server_name_scop option

fixes bug 1074199

grizzly adds this new option to check for duplicate
hostnames.

Patchset minor edits.

Change-Id: Ie522d8927b5dbc88df5b7d28c8d589bd290e75f3
Merge "add osapi_compute_unique_server_name_scop option"