doc/eap.doxygen was mentioning eap_method structure, but there was no
reference as in doc/eap_server.doxygen on a similar paragraph
Signed-off-by: Sergei Sinyak <serega.belarus@gmail.com>
in the build.
EAP methods must implement the interface defined in \ref eap_i.h. struct
-eap_method defines the needed function pointers that each EAP method
+\ref eap_method defines the needed function pointers that each EAP method
must provide. In addition, the EAP type and name are registered using
this structure. This interface is based on section 4.4 of RFC 4137.