1.21
	Bug fixed: 23939 23938

1.20
	Added HTTP proxy support

1.18
	Has corrected for work with Windows systems ( windows 2000 )

1.17
	Added parameter CHAIN_FILE_DATA for use SC without configuration file.

1.16
	Has corrected work with $^W=1

1.15-1
	Added PREREQ_PM keyword to Makefile.PL 
