Misc Coverity fixes in camcontrol(8)
CID 1229913 Fix output of "camcontrol persist -i report_capabilities".
The reported Persistent Reservation Types are currently wrong in all cases.
CID 1356029 Annotate the code so Coverity will know that this is a false
positive.
CID 1366830 Fix a memory leak
CID 1366832 Fix a segfault that could be caused by bad drive firmware
Also, fix the man page entry for the "camcontrol epc state" command to match
what the code does.