Converts an absolute time from 128-bit UTC format to an ASCII
    string.

    On Alpha and Integrity server systems, this service accepts 64-
    bit addresses.

    Format

      SYS$ASCUTC  [timlen] ,timbuf ,[utcadr] ,[cvtflg]

    C Prototype

      int sys$ascutc  (unsigned short int *timlen, void *timbuf,

                      unsigned int *utcadr [4], char cvtflg);