Version 0.56 20001226
  more strict userid check

Version 0.55 20001107
  perform check on userid to avoid Postgres metacharacter expansion

Version 0.54 20000402
  made storage variables static to avoid corruption
  updated check.c to print more information

Version 0.53 20000127
  added support for last field
  changed now() to CURRENT_TIMESTAMP

Version 0.52 20000104
  added support for enabled, start, and stop fields

Version 0.51 19991217
  more documentation

Version 0.50 19991212
  separated defines into getpg.h
  added getpguid.c
  added check.c and simple docs

Version 0.10 19991209
  initial version
