minergate: Support --set MGT:protover=N
minergate: Vary number of requests/responses per packet
minergate: Vary max jobs queued
Bugfix: minergate: Correct endian for 2nd winner_nonce
minergate: Simplify multi-winner_nonce handling
minergate: Only SP10 has a second winner_nonce
minergate: Use work_completed flag for SP30
minergate: SP30 only wants max 10 queue requests at a time
minergate: Make stats file configurable
minergate: Autodetect SP30 on /tmp/connection_pipe_sp30
minergate: Support minergate-side ntime rolling for SP30 only
minergate: Fix hashmeter
Merge pull request #568 from luke-jr/sp30

minergate: Spondoolies SP30 support