Fixed the doxygen documentation.

libssh/options.c

@@ -39,6 +39,11 @@
 #include "libssh/server.h"
 #endif
 
+/**
+ * @addtogroup ssh_session
+ * @{
+ */
+
 /**
  * @brief Duplicate the options of a session structure.
  *
@@ -616,8 +621,13 @@ int ssh_options_set(ssh_session session, enum ssh_options_e type,
 
   return 0;
 }
+/** @} */
 
 #ifdef WITH_SERVER
+/**
+ * @addtogroup ssh_server
+ * @{
+ */
 static int ssh_bind_options_set_algo(ssh_bind sshbind, int algo,
     const char *list) {
   if (!verify_existing_algo(algo, list)) {