Clean up LW backend for socket waiting:  - rename MAP-NETWORK-ERRORS to MAP-NETWORK-EVENTS  - reimplement more lispy HAS-NETWORK-ERRORS-P (record for posterity, as it's now unused)  - change implementation of SOCKETS-READY to use MAP-NETWORK-EVENTS
Clean up LW backend for socket waiting:
 - rename MAP-NETWORK-ERRORS to MAP-NETWORK-EVENTS
 - reimplement more lispy HAS-NETWORK-ERRORS-P (record for posterity, as it's now unused)
 - change implementation of SOCKETS-READY to use MAP-NETWORK-EVENTS


mcna/usocket