Fix nickname and channel detection

* Nicknames were assumed to be in [A-Za-z] format. Just detecting
  a [^!] now as ! separates the nickname from the host.
* Channels may start with two hashes, the previous regexp didn't
  recognize that.

shbot.sh

@@ -11,7 +11,7 @@ do
 	if [[ "$LINE" =~ PING\ *:(.*) ]]; then
 		echo "PONG :${BASH_REMATCH[1]}" >&3
 	else
-		[[ ${LINE} =~ :[a-zA-Z]*!.*(#.*)\ :.* ]] && ORIGIN=${BASH_REMATCH[1]}
+		[[ ${LINE} =~ :[^!]*![^#]*(#.*)\ :.* ]] && ORIGIN=${BASH_REMATCH[1]}
 		echo "${LINE}" | ./shbrain.sh | \
 		while true
 		do

shbrain.sh

@@ -8,7 +8,7 @@ do
 	LINE=${LINE[@]:0:$LEN}
 
 	### Parsing potential shcmd
-	if [[ $LINE =~ :([a-zA-Z]*)!.*:shcmd ]]; then
+	if [[ $LINE =~ :([^!]*)!.*:shcmd ]]; then
 		EXPAND=(${LINE})
 		CMD=${EXPAND[4]#:}
 		ARGS=${EXPAND[*]:5}