illumos gate

git commit eb62f060787d63335f2b0777ff86c16204bca93a

commit  eb62f060787d63335f2b0777ff86c16204bca93a
Author: Jason King <jason.king@joyent.com>
Date:   2019-09-30T16:36:42.000Z

    10517 Convert dkio(7I) to mandoc
    10518 Convert fbio(7I) to mandoc
    10519 Convert fdio(7I) to mandoc
    10520 Convert hdio(7I) to mandoc
    10521 Convert iec61883(7I) to mandoc
    10522 Convert ipnat(7I) to mandoc
    10527 Convert mhd(7I) to mandoc
    10528 Convert mixer(7I) to mandoc
    10529 Convert mtio(7I) to mandoc
    10530 Convert prnio(7I) to mandoc
    10531 Convert quotactl(7I) to mandoc
    10532 Convert sesio(7I) to mandoc
    10533 Convert sockio(7I) to mandoc
    10560 Convert termio(7I) to mandoc
    10561 Convert termiox(7I) to mandoc
    10562 Convert visual_io(7I) to mandoc
    10563 Convert vt(7I) to mandoc
    10564 Convert uscsi(7I) to mandoc
    10596 Convert streamio(7I) to mandoc
    Reviewed by: Peter Tribble <peter.tribble@gmail.com>
    Reviewed by: Dan McDonald <danmcd@joyent.com>
    Approved by: Gordon Ross <gordon.w.ross@gmail.com>