[1.0.3] Test failure: p2p_sync_throttle_test

[greg7mdp]

Resolves #882.

While moving some code around (see here), a call to:

void connection::close(bool reconnect, bool shutdown)

became a call to:

int close(int __fd)

This restores the intended behavior (close the actual connection, instead of closing fd number 1)

[ericpassmore]

Note:start
category: System Stability
component: P2P
summary: Fix p2p sync to close connection.
Note:end