Release 0.16.21

Check for incorrect REP/REPNE prefix use

Import Dev86src-0.16.19.tar.gz

Import Dev86src-0.16.18.tar.gz

Import Dev86src-0.16.17.tar.gz

Import Dev86src-0.16.16.tar.gz

Import Dev86src-0.16.15.tar.gz

Import Dev86src-0.16.14.tar.gz

Import Dev86src-0.16.13.tar.gz

Import Dev86src-0.16.12.tar.gz