Merge pull request #4142
cef4494 rpc: keep track of acceptors, and cancel them in StopRPCThreads (Wladimir J. van der Laan)
381b25d doc: remove mention of -rpctimeout from man page (Wladimir J. van der Laan)
1a44522 rpc: Make sure conn object is always cleaned up (Wladimir J. van der Laan)
0a0cd34 rpc: pass errors from async_accept (Wladimir J. van der Laan)