SDP-1286: Make auth.id and the default commit-server ServerID OrgName-aware.
Introduces an optional ORGNAME setting (blank by default, preserving
prior-release values) so that:
- The default commit-server ServerID (MASTER_ID in mkdirs.cfg) becomes
master.<OrgName>.<SDPInstance> when OrgName is set, per the Server Spec
Naming Standard.
- configure_new_server.sh's auth.id default becomes
p4_<OrgName>.<SDPInstance>, independent of $P4SERVER (which remains a
fixed p4_<SDPInstance> shorthand used elsewhere for filenames/log tags).
- ccheck.sh's auth.id auto-fix advice is corrected to match this pattern
(it previously suggested p4_<P4MASTER_ID>, which used the wrong basis
entirely).
A more unique auth.id also avoids collisions during cross-organization
p4 push/p4 fetch, which require differing auth.id values on either side.
install_sdp.sh gains a Config['OrgName'] setting, wired into generated
mkdirs.<N>.cfg files. Doc updated in SDP_Guide.Unix.adoc to reflect that
this is now the actual implemented default, not just documented guidance.
No mkrep.sh changes needed (it only inherits P4MASTER_ID).