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/ctrl/control_if.c b/src/ctrl/control_if.c
index 5a84f7c0..5d04cdf 100644
--- a/src/ctrl/control_if.c
+++ b/src/ctrl/control_if.c
@@ -126,7 +126,7 @@
 	return ret;
 }
 
-/*! \brief Send TRAP over given Control Interface
+/*! Send TRAP over given Control Interface
  *  \param[in] ctrl Control Interface over which TRAP will be sent
  *  \param[in] name Name of the TRAP variable
  *  \param[in] value Value of the TRAP variable
@@ -401,7 +401,7 @@
 	return rc;
 }
 
-/*! \brief Allocate CTRL connection
+/*! Allocate CTRL connection
  *  \param[in] ctx Context from which talloc should allocate it
  *  \param[in] data caller's private data parameter which should assigned to
                write queue's file descriptor data parameter.
@@ -729,7 +729,7 @@
 	return -1;
 }
 
-/*! \brief Allocate a CTRL interface handle
+/*! Allocate a CTRL interface handle
  *  \param[in] ctx Tallo callocation context to be used
  *  \param[in] data Pointer which will be made available to each
                set_..() get_..() verify_..() control command function
@@ -754,7 +754,7 @@
 	return ctrl;
 }
 
-/*! \brief Setup CTRL interface on a given address
+/*! Setup CTRL interface on a given address
  *  \param[in] data Pointer which will be made available to each
                set_..() get_..() verify_..() control command function
  *  \param[in] bind_addr Address on which CTRL socket shall listen
@@ -788,7 +788,7 @@
 	return ctrl;
 }
 
-/*! \brief Install a lookup helper function for control nodes
+/*! Install a lookup helper function for control nodes
  *  This function is used by e.g. library code to install lookup helpers
  *  for additional nodes in the control interface.
  *  \param[in] lookup The lookup helper function
@@ -813,7 +813,7 @@
 	return 0;
 }
 
-/*! \brief Helper for "local execution" of a CTRL command from a string
+/*! Helper for "local execution" of a CTRL command from a string
  *  The function will parse + execute the given control command string
  *  and return a corresponding ctrl_cmd.  Caller is responsible to
  *  talloc_free() the return value.