doxygen: enable AUTOBRIEF, drop \brief

Especially for short descriptions, it is annoying to have to type \brief for
every single API doc.

Drop all \brief and enable the AUTOBRIEF feature of doxygen, which always takes
the first sentence of an API doc as the brief description.

Change-Id: I11a8a821b065a128108641a2a63fb5a2b1916e87
diff --git a/src/gb/gprs_ns.c b/src/gb/gprs_ns.c
index 17933ed..51d1c3c 100644
--- a/src/gb/gprs_ns.c
+++ b/src/gb/gprs_ns.c
@@ -177,7 +177,7 @@
 }
 
 
-/*! \brief Lookup struct gprs_nsvc based on NSVCI
+/*! Lookup struct gprs_nsvc based on NSVCI
  *  \param[in] nsi NS instance in which to search
  *  \param[in] nsvci NSVCI to be searched
  *  \returns gprs_nsvc of respective NSVCI
@@ -192,7 +192,7 @@
 	return NULL;
 }
 
-/*! \brief Lookup struct gprs_nsvc based on NSEI
+/*! Lookup struct gprs_nsvc based on NSEI
  *  \param[in] nsi NS instance in which to search
  *  \param[in] nsei NSEI to be searched
  *  \returns first gprs_nsvc of respective NSEI
@@ -258,7 +258,7 @@
 	return nsvc;
 }
 
-/*! \brief Delete given NS-VC
+/*! Delete given NS-VC
  *  \param[in] nsvc gprs_nsvc to be deleted
  */
 void gprs_nsvc_delete(struct gprs_nsvc *nsvc)
@@ -346,7 +346,7 @@
 	{ 0, NULL }
 };
 
-/*! \brief Obtain a human-readable string for NS cause value */
+/*! Obtain a human-readable string for NS cause value */
 const char *gprs_ns_cause_str(enum ns_cause cause)
 {
 	return get_value_string(ns_cause_str, cause);
@@ -407,7 +407,7 @@
 	return gprs_ns_tx(nsvc, msg);
 }
 
-/*! \brief Transmit a NS-RESET on a given NSVC
+/*! Transmit a NS-RESET on a given NSVC
  *  \param[in] nsvc NS-VC used for transmission
  *  \paam[in] cause Numeric NS cause value
  */
@@ -438,7 +438,7 @@
 
 }
 
-/*! \brief Transmit a NS-STATUS on a given NSVC
+/*! Transmit a NS-STATUS on a given NSVC
  *  \param[in] nsvc NS-VC to be used for transmission
  *  \param[in] cause Numeric NS cause value
  *  \param[in] bvci BVCI to be reset within NSVC
@@ -492,7 +492,7 @@
 	return gprs_ns_tx(nsvc, msg);
 }
 
-/*! \brief Transmit a NS-BLOCK on a tiven NS-VC
+/*! Transmit a NS-BLOCK on a tiven NS-VC
  *  \param[in] nsvc NS-VC on which the NS-BLOCK is to be transmitted
  *  \param[in] cause Numeric NS Cause value
  *  \returns 0 in case of success
@@ -525,7 +525,7 @@
 	return gprs_ns_tx(nsvc, msg);
 }
 
-/*! \brief Transmit a NS-UNBLOCK on a given NS-VC
+/*! Transmit a NS-UNBLOCK on a given NS-VC
  *  \param[in] nsvc NS-VC on which the NS-UNBLOCK is to be transmitted
  *  \returns 0 in case of success
  */
@@ -538,7 +538,7 @@
 	return gprs_ns_tx_simple(nsvc, NS_PDUT_UNBLOCK);
 }
 
-/*! \brief Transmit a NS-ALIVE on a given NS-VC
+/*! Transmit a NS-ALIVE on a given NS-VC
  *  \param[in] nsvc NS-VC on which the NS-ALIVE is to be transmitted
  *  \returns 0 in case of success
  */
@@ -551,7 +551,7 @@
 	return gprs_ns_tx_simple(nsvc, NS_PDUT_ALIVE);
 }
 
-/*! \brief Transmit a NS-ALIVE-ACK on a given NS-VC
+/*! Transmit a NS-ALIVE-ACK on a given NS-VC
  *  \param[in] nsvc NS-VC on which the NS-ALIVE-ACK is to be transmitted
  *  \returns 0 in case of success
  */
@@ -693,7 +693,7 @@
 	return gprs_ns_tx(nsvc, msg);
 }
 
-/*! \brief High-level function for transmitting a NS-UNITDATA messsage
+/*! High-level function for transmitting a NS-UNITDATA messsage
  *  \param[in] nsi NS-instance on which we shall transmit
  *  \param[in] msg struct msgb to be trasnmitted
  *
@@ -1110,7 +1110,7 @@
 int gprs_ns_process_msg(struct gprs_ns_inst *nsi, struct msgb *msg,
 		      struct gprs_nsvc **nsvc);
 
-/*! \brief Receive incoming NS message from underlying transport layer
+/*! Receive incoming NS message from underlying transport layer
  *  \param nsi NS instance to which the data belongs
  *  \param[in] msg message buffer containing newly-received data
  *  \param[in] saddr socketaddr from which data was received
@@ -1194,7 +1194,7 @@
 	}
 }
 
-/*! \brief Create/get NS-VC independently from underlying transport layer
+/*! Create/get NS-VC independently from underlying transport layer
  *  \param nsi NS instance to which the data belongs
  *  \param[in] msg message buffer containing newly-received data
  *  \param[in] fallback_nsvc is used to send error messages back to the peer
@@ -1316,7 +1316,7 @@
 	return GPRS_NS_CS_FOUND;
 }
 
-/*! \brief Process NS message independently from underlying transport layer
+/*! Process NS message independently from underlying transport layer
  *  \param nsi NS instance to which the data belongs
  *  \param[in] msg message buffer containing newly-received data
  *  \param[inout] nsvc refers to the virtual connection, may be modified when
@@ -1406,7 +1406,7 @@
 	return rc;
 }
 
-/*! \brief Create a new GPRS NS instance
+/*! Create a new GPRS NS instance
  *  \param[in] cb Call-back function for incoming BSSGP data
  *  \returns dynamically allocated gprs_ns_inst
  */
@@ -1452,7 +1452,7 @@
 	}
 }
 
-/*! \brief Destroy an entire NS instance
+/*! Destroy an entire NS instance
  *  \param nsi gprs_ns_inst that is to be destroyed
  *
  *  This function releases all resources associated with the
@@ -1552,7 +1552,7 @@
 	return rc;
 }
 
-/*! \brief Create a listening socket for GPRS NS/UDP/IP
+/*! Create a listening socket for GPRS NS/UDP/IP
  *  \param[in] nsi NS protocol instance to listen
  *  \returns >=0 (fd) in case of success, negative in case of error
  *
@@ -1586,7 +1586,7 @@
 	return ret;
 }
 
-/*! \brief Initiate a RESET procedure
+/*! Initiate a RESET procedure
  *  \param[in] nsvc NS-VC in which to start the procedure
  *  \param[in] cause Numeric NS cause value
  *
@@ -1616,7 +1616,7 @@
 	return rc;
 }
 
-/*! \brief Establish a NS connection (from the BSS) to the SGSN
+/*! Establish a NS connection (from the BSS) to the SGSN
  *  \param nsi NS-instance
  *  \param[in] dest Destination IP/Port
  *  \param[in] nsei NSEI of the to-be-established NS-VC