No big speedup measurable but very visible in tracing.

before:

BenchmarkLinkNetPipeRTT-4         200000              9763 ns/op            9664 B/op         25 allocs/op
BenchmarkLinkTCPRTT-4             100000             19069 ns/op            9664 B/op         25 allocs/op

after:

BenchmarkLinkNetPipeRTT-4         200000              7872 ns/op            1224 B/op         17 allocs/op
BenchmarkLinkTCPRTT-4             100000             18465 ns/op            1221 B/op         17 allocs/op

BenchmarkGetObject-4       50000             22679 ns/op           11439 B/op         50 allocs/op

It was erroneously giving true, which if Client.Load ran earlier than
talkMaster->init could result in:

F0906 12:34:16.353097    7933 zsha1.go:32] zsha1: client: load <03c1e49367e07912:0000000000000000: internal inconsistency: cluster is operational, but no storages alive for oid 0000000000000000

BenchmarkChanRTT-4               5000000               345 ns/op               0 B/op          0 allocs/op
BenchmarkNetPipeRTT-4            2000000               873 ns/op               0 B/op          0 allocs/op
BenchmarkTCPloopback-4            300000              4929 ns/op               0 B/op          0 allocs/op
BenchmarkLinkTCPRTT-4              50000             27201 ns/op           11091 B/op         43 allocs/op

BenchmarkChanRTT-4               5000000               352 ns/op               0 B/op          0 allocs/op
BenchmarkNetPipeRTT-4            2000000               863 ns/op               0 B/op          0 allocs/op
BenchmarkTCPloopback-4            300000              4875 ns/op               0 B/op          0 allocs/op