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/msgb.c b/src/msgb.c
index 136ad88..bad98f4 100644
--- a/src/msgb.c
+++ b/src/msgb.c
@@ -20,7 +20,7 @@
 
 /*! \addtogroup msgb
  *  @{
- *  \brief libosmocore message buffers, inspired by Linux kernel skbuff
+ *  libosmocore message buffers, inspired by Linux kernel skbuff
  *
  *  Inspired by the 'struct skbuff' of the Linux kernel, we implement a
  *  'struct msgb' which we use for handling network
@@ -62,7 +62,7 @@
 
 void *tall_msgb_ctx = NULL;
 
-/*! \brief Allocate a new message buffer
+/*! Allocate a new message buffer
  * \param[in] size Length in octets, including headroom
  * \param[in] name Human-readable name to be associated with msgb
  * \returns dynamically-allocated \ref msgb
@@ -91,7 +91,7 @@
 	return msg;
 }
 
-/*! \brief Release given message buffer
+/*! Release given message buffer
  * \param[in] m Message buffer to be free'd
  */
 void msgb_free(struct msgb *m)
@@ -99,7 +99,7 @@
 	talloc_free(m);
 }
 
-/*! \brief Enqueue message buffer to tail of a queue
+/*! Enqueue message buffer to tail of a queue
  * \param[in] queue linked list header of queue
  * \param[in] msg message buffer to be added to the queue
  *
@@ -111,7 +111,7 @@
 	llist_add_tail(&msg->list, queue);
 }
 
-/*! \brief Dequeue message buffer from head of queue
+/*! Dequeue message buffer from head of queue
  * \param[in] queue linked list header of queue
  * \returns message buffer (if any) or NULL if queue empty
  *
@@ -134,7 +134,7 @@
 		return NULL;
 }
 
-/*! \brief Re-set all message buffer pointers
+/*! Re-set all message buffer pointers
  *  \param[in] msg message buffer that is to be resetted
  *
  * This will re-set the various internal pointers into the underlying
@@ -157,7 +157,7 @@
 	memset(&msg->cb, 0, sizeof(msg->cb));
 }
 
-/*! \brief get pointer to data section of message buffer
+/*! get pointer to data section of message buffer
  *  \param[in] msg message buffer
  *  \returns pointer to data section of message buffer
  */
@@ -166,7 +166,7 @@
 	return msg->data;
 }
 
-/*! \brief get length of message buffer
+/*! get length of message buffer
  *  \param[in] msg message buffer
  *  \returns length of data section in message buffer
  */
@@ -175,7 +175,7 @@
 	return msg->len;
 }
 
-/*! \brief Set the talloc context for \ref msgb_alloc
+/*! Set the talloc context for \ref msgb_alloc
  * Deprecated, use msgb_talloc_ctx_init() instead.
  *  \param[in] ctx talloc context to be used as root for msgb allocations
  */
@@ -184,7 +184,7 @@
 	tall_msgb_ctx = ctx;
 }
 
-/*! \brief Initialize a msgb talloc context for \ref msgb_alloc.
+/*! Initialize a msgb talloc context for \ref msgb_alloc.
  * Create a talloc context called "msgb". If \a pool_size is 0, create a named
  * const as msgb talloc context. If \a pool_size is nonzero, create a talloc
  * pool, possibly for faster msgb allocations (see talloc_pool()).
@@ -202,7 +202,7 @@
 	return tall_msgb_ctx;
 }
 
-/*! \brief Copy an msgb.
+/*! Copy an msgb.
  *
  *  This function allocates a new msgb, copies the data buffer of msg,
  *  and adjusts the pointers (incl l1h-l4h) accordingly. The cb part
@@ -239,7 +239,7 @@
 	return new_msg;
 }
 
-/*! \brief Resize an area within an msgb
+/*! Resize an area within an msgb
  *
  *  This resizes a sub area of the msgb data and adjusts the pointers (incl
  *  l1h-l4h) accordingly. The cb part is not updated. If the area is extended,
@@ -293,7 +293,7 @@
 }
 
 
-/*! \brief Return a (static) buffer containing a hexdump of the msg
+/*! Return a (static) buffer containing a hexdump of the msg
  * \param[in] msg message buffer
  * \returns a pointer to a static char array
  */