Move all rawapi.txt to appropriate doxygen docs

src/core/raw.c

@@ -10,7 +10,7 @@
  * Implementation of raw protocol PCBs for low-level handling of
  * different types of protocols besides (or overriding) those
  * already available in lwIP.\n
- * @see @ref raw_api
+ * @see @ref api
  */
 
 /*

src/core/tcp.c

@@ -6,7 +6,7 @@
  * @defgroup tcp_raw TCP
  * @ingroup callbackstyle_api
  * Transmission Control Protocol for IP\n
- * @see @ref raw_api and @ref netconn
+ * @see @ref api
  *
  * Common functions for the TCP implementation, such as functinos
  * for manipulating the data structures and the TCP timer functions. TCP functions

src/core/udp.c

@@ -7,7 +7,7 @@
  * @defgroup udp_raw UDP
  * @ingroup callbackstyle_api
  * User Datagram Protocol module\n
- * @see @ref raw_api and @ref netconn
+ * @see @ref api
  */
 
 /*