ctype: add doc
@@ -227,6 +227,7 @@ copied by the `spec` plugin just before):
- [path](path/) by checking files on file system
- [type](type/) using run-time type checking (CORBA types/)
- [enum](enum/) compares the keyvalue against a list of valid values
+- [ctype](ctype/) type checking (CORBA types) and enum functionality, written in C
- [mathcheck](mathcheck/) by mathematical expressions using key values as operands
- [conditionals](conditionals/) by using if-then-else like statements
- [required](required/) rejects non-required keys
