HTCONDOR-1382: Use history file banner to improve condor_history search speeds
HTCONDOR-1382: Use history file banner to improve condor_history search speeds

-PR changes 1
   -Reverted found match but failed to read ad attribute logic
   -Better logic for failing to read banner info
   -strcasecmp set to equal MATCH
   -Removed final offset check

htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor