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/include/osmocom/core/rate_ctr.h b/include/osmocom/core/rate_ctr.h
index ebaa7a7..b75967a 100644
--- a/include/osmocom/core/rate_ctr.h
+++ b/include/osmocom/core/rate_ctr.h
@@ -10,60 +10,60 @@
 
 #include <osmocom/core/linuxlist.h>
 
-/*! \brief Number of rate counter intervals */
+/*! Number of rate counter intervals */
 #define RATE_CTR_INTV_NUM	4
 
-/*! \brief Rate counter interval */
+/*! Rate counter interval */
 enum rate_ctr_intv {
-	RATE_CTR_INTV_SEC,	/*!< \brief last second */
-	RATE_CTR_INTV_MIN,	/*!< \brief last minute */
-	RATE_CTR_INTV_HOUR,	/*!< \brief last hour */
-	RATE_CTR_INTV_DAY,	/*!< \brief last day */
+	RATE_CTR_INTV_SEC,	/*!< last second */
+	RATE_CTR_INTV_MIN,	/*!< last minute */
+	RATE_CTR_INTV_HOUR,	/*!< last hour */
+	RATE_CTR_INTV_DAY,	/*!< last day */
 };
 
-/*! \brief data we keep for each of the intervals */
+/*! data we keep for each of the intervals */
 struct rate_ctr_per_intv {
-	uint64_t last;		/*!< \brief counter value in last interval */
-	uint64_t rate;		/*!< \brief counter rate */
+	uint64_t last;		/*!< counter value in last interval */
+	uint64_t rate;		/*!< counter rate */
 };
 
-/*! \brief data we keep for each actual value */
+/*! data we keep for each actual value */
 struct rate_ctr {
-	uint64_t current;	/*!< \brief current value */
-	uint64_t previous;	/*!< \brief previous value, used for delta */
-	/*! \brief per-interval data */
+	uint64_t current;	/*!< current value */
+	uint64_t previous;	/*!< previous value, used for delta */
+	/*! per-interval data */
 	struct rate_ctr_per_intv intv[RATE_CTR_INTV_NUM];
 };
 
-/*! \brief rate counter description */
+/*! rate counter description */
 struct rate_ctr_desc {
-	const char *name;	/*!< \brief name of the counter */
-	const char *description;/*!< \brief description of the counter */
+	const char *name;	/*!< name of the counter */
+	const char *description;/*!< description of the counter */
 };
 
-/*! \brief description of a rate counter group */
+/*! description of a rate counter group */
 struct rate_ctr_group_desc {
-	/*! \brief The prefix to the name of all counters in this group */
+	/*! The prefix to the name of all counters in this group */
 	const char *group_name_prefix;
-	/*! \brief The human-readable description of the group */
+	/*! The human-readable description of the group */
 	const char *group_description;
-	/*! \brief The class to which this group belongs */
+	/*! The class to which this group belongs */
 	int class_id;
-	/*! \brief The number of counters in this group */
+	/*! The number of counters in this group */
 	const unsigned int num_ctr;
-	/*! \brief Pointer to array of counter names */
+	/*! Pointer to array of counter names */
 	const struct rate_ctr_desc *ctr_desc;
 };
 
-/*! \brief One instance of a counter group class */
+/*! One instance of a counter group class */
 struct rate_ctr_group {
-	/*! \brief Linked list of all counter groups in the system */
+	/*! Linked list of all counter groups in the system */
 	struct llist_head list;
-	/*! \brief Pointer to the counter group class */
+	/*! Pointer to the counter group class */
 	const struct rate_ctr_group_desc *desc;
-	/*! \brief The index of this ctr_group within its class */
+	/*! The index of this ctr_group within its class */
 	unsigned int idx;
-	/*! \brief Actual counter structures below */
+	/*! Actual counter structures below */
 	struct rate_ctr ctr[0];
 };
 
@@ -78,19 +78,19 @@
 
 void rate_ctr_group_free(struct rate_ctr_group *grp);
 
-/*! \brief Increment the counter by \a inc
+/*! Increment the counter by \a inc
  *  \param ctr \ref rate_ctr to increment
  *  \param inc quantity to increment \a ctr by */
 void rate_ctr_add(struct rate_ctr *ctr, int inc);
 
-/*! \brief Increment the counter by 1
+/*! Increment the counter by 1
  *  \param ctr \ref rate_ctr to increment */
 static inline void rate_ctr_inc(struct rate_ctr *ctr)
 {
 	rate_ctr_add(ctr, 1);
 }
 
-/*! \brief Return the counter difference since the last call to this function */
+/*! Return the counter difference since the last call to this function */
 int64_t rate_ctr_difference(struct rate_ctr *ctr);
 
 int rate_ctr_init(void *tall_ctx);
@@ -104,7 +104,7 @@
 typedef int (*rate_ctr_group_handler_t)(struct rate_ctr_group *, void *);
 
 
-/*! \brief Iterate over all counters
+/*! Iterate over all counters
  *  \param[in] handle_item Call-back function, aborts if rc < 0
  *  \param[in] data Private data handed through to \a handle_counter
  */