in unit sockets.pp some constants are just alias from other constant, for example
const
EsockEINTR = EsysEINTR;
EsockEWOULDBLOCK = EsysEWouldBlock;
...
But I can't find EsockEAGAIN. Is there particular reason why EsockEAGAIN is not mapped to EsysEAGAIN constant?