updated the usage info for sregex-cli to reflect recent changes.
updated the usage info for sregex-cli to reflect recent changes.

MarginC/sregex,MarginC/sregex,openresty/sregex,openresty/sregex,MarginC/sregex,MarginC/sregex,MarginC/sregex,openresty/sregex,openresty/sregex