Sort find output and avoid duplicated /

Some find implementations will produce results like "dir//a" if given
"find dir/".

cassh.sh

@@ -139,7 +139,8 @@ main_issue()
 	if [ ! -d "$PATH_PUBKEYS_DIR" ]; then
 		exit 0
 	fi
-	find "$PATH_PUBKEYS_DIR/" -type f -name '*.pub' ! -name '*-cert.pub' | {
+	find "$PATH_PUBKEYS_DIR" -type f -name '*.pub' ! -name '*-cert.pub' |
+	    sort | {
 		ca_comment=$(get_ca_sk_comment_from_pk "$PATH_CA_PUB")
 		: ${ca_comment:=cassh}