ctbcap: optimize $MODEL proc

ctbcap

@@ -215,13 +215,13 @@ genesis_juicer() {
 	# Assume ${MODEL} contain some URL form, process & cut invalid chars.
 	local _MODEL="$(echo "${MODEL}" \
 		| tr '[:upper:]' '[:lower:]' \
-		| grep -oE 'http[s]?://[a-zA-Z]?+[.]?[a-zA-Z]+[.][a-zA-Z]+[/][^ /]+' \
+		| grep -oE 'http[s]?://[a-z0-9-]?+[.]?[a-z0-9-]+[.][a-z]+[/][^ /]+' \
 		| cut -d '/' -f4 \
-		| grep -oE '[a-zA-Z0-9_-]+' \
+		| grep -oE '[a-z0-9_-]+' \
 		| head -n 1)"
 	[ -n "${_MODEL}" ] && MODEL="${_MODEL}"
 	# If ${MODEL} not URL form, cut invalid chars.
-	[ -z "${_MODEL}" ] && local _MODEL="$(echo "${MODEL}" | tr '[:upper:]' '[:lower:]'| grep -oE '[a-zA-Z0-9_-]+' | head -n 1)"
+	[ -z "${_MODEL}" ] && local _MODEL="$(echo "${MODEL}" | tr '[:upper:]' '[:lower:]'| grep -oE '[a-z0-9_-]+' | head -n 1)"
 	[ -z "${_MODEL}" ] && {
 		echo "(ERROR) Invalid Username or URL! [${MODEL}]" >&2
 		echo >&2