Defines starting with `c' in bsd/netccitt

• CALL bsd/netccitt/pk.h:199
• CALL_ACCEPTED bsd/netccitt/pk.h:200
• called_addrlen bsd/netccitt/pk_var.h:208
• calling_addrlen bsd/netccitt/pk_var.h:207
• CCITTPROTO_HDLC bsd/netccitt/x25.h:75
• CCITTPROTO_X25 bsd/netccitt/x25.h:76
• CLEAR bsd/netccitt/pk.h:201
• CLEAR_CONF bsd/netccitt/pk.h:202