in deploy-runner-agent/src/main/java/jetbrains/buildServer/deployer/agent/ssh/SSHSessionProvider.java [230:238]
private static SSHAgentConnector buildSshAgentConnector(String socketPath) throws AgentProxyException {
final SSHAgentConnector connector;
if ((socketPath == null || socketPath.equalsIgnoreCase(PIPE_OPENSSH_SSH_AGENT)) && TCSystemInfo.isWindows) {
connector = new SSHAgentConnector(new RFAUSocketFactory(), Paths.get(socketPath));
} else {
connector = new SSHAgentConnector(new File(socketPath).toPath());
}
return connector;
}