Use microtime, not getmicrotime, for timing debug entries.
Use microtime, not getmicrotime, for timing debug entries.

init_drive: Rephrase error message text.
	    Remove dead code (inside #if 0).

Change name of find_drive_by_dev to the more descriptive
find_drive_by_name.

Tidy up comments.

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase