Change 27536
Legacy Upgrade Guide doc updates:
* Added 'Put New SDP in Place' section.
* Added 'Set SDP Counters' section to set SDP_VERSION and SDP_DATE counters.
* Covered updating depot spec Map fields.
* Covered adding server.id files.
* Added missing content on putting new SDP directory in place.
SDP_Guide.Unix doc updates:
* Added Legacy Upgrade Scripts section w/clear_depot_Map_fields.sh.
Updated Makefile with new doc build dependencies.
Regenerated docs.
* Added 'Put New SDP in Place' section.
* Added 'Set SDP Counters' section to set SDP_VERSION and SDP_DATE counters.
* Covered updating depot spec Map fields.
* Covered adding server.id files.
* Added missing content on putting new SDP directory in place.
SDP_Guide.Unix doc updates:
* Added Legacy Upgrade Scripts section w/clear_depot_Map_fields.sh.
Updated Makefile with new doc build dependencies.
Regenerated docs.
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