+ src/codepage/cp_gbk.c
+ src/codepage/gbk.c
* src/codepage/Makefile
* include/hbcpage.hbx
+ added GBK CP.
GBK is an extension of the GB2312 character set for simplified Chinese
characters, used in the People's Republic of China. GBK encoding support
for Simplified Chinese, while fully contained BIG5. Microsoft implemented
GBK in Windows 95 and Windows NT 3.51 as Code Page 936.
Thanks to Wang Dongming for the two new source files.
Please review/test it.
* src/rtl/langcomp.prg
! use GBK CP instead of BIG5 for legacy CP "ZHGB"
* extras/httpsrv/session.prg
* cleanup