Eliminated secondary domain socket file.  All domain socket I/O is through the primary socket and seems to work fine.
Could not get netcat/socat to work to replace ircConnection.php.  netcat is only unidirectional.  socat can do bidirectional, but can't seem to keep a persistent TCP connection such that disconnecting and reconnecting to the domain socket will resume the live TCP connection.
Removed build directory from repo.
This will require calling make from the src directory to prepare deployment.
spSocketProxy configured to accept only one client domain socket connection at a time.
Previous functionality was to close existing client connection if a new one is made.
Refactor rename anything referencing "primary socket" as just "socket".