Change log:
d385884 Upgrade to SF-4.3.20
b1b3174 GH-2471: Close client on outbound adapter
ef9c760 RemoteFTempl: InputStream.close() in the finally
1fe22ea Add TCP Test Diagnostics
04ce95b Back-port TcpNioConnectionReadTests changes
e2de2e3 Avoid leaking Zookeeper znodes in tryLock
424bf91 Remove max-rows from Stored Proc-in-ch-ad Docs
f2501e0 INT-4490: DefaultLockRepo: no uppercase format
1f50b96 INT-4498: StreamUtils -> FileCopyUtils
963a2fb INT-4498: SFTP: Close privateKey resource
3a13e59 INT-3916: ZK: Fix missing doc update