Add a user-defined custom header to a dictionary of OBEXheaders.
- macOS 10.6+
bytes you want to put in the user-defined header.
length of the bytes you want to put in user-defined header.
dictionary you have allocated to hold the headers. Make sure it's mutable.
Error code, kOBEXSuccess (0) if success.
User Defined header - OBEX Spec, 2.2.20: User Defined Headers.