Small fixes.

sql/mysqld.cc:
  Added use of find_type_or_exit() for another option.
sql/net_serv.cc:
  Bug in version number check, could occassionally make a tree
  red.

sql/mysqld.cc

@@ -280,7 +280,11 @@ static TYPELIB tc_heuristic_recover_typelib=
 };
 
 static const char *thread_handling_names[]=
-{ "one-thread-per-connection", "no-threads", "pool-of-threads", NullS};
+{ "one-thread-per-connection", "no-threads",
+#if HAVE_POOL_OF_THREADS == 1
+  "pool-of-threads",
+#endif
+  NullS};
 
 TYPELIB thread_handling_typelib=
 {
@@ -7860,16 +7864,8 @@ get_one_option(int optid, const struct my_option *opt __attribute__((unused)),
     break;
   case OPT_THREAD_HANDLING:
   {
-    if ((global_system_variables.thread_handling=
-         find_type(argument, &thread_handling_typelib, 2)) <= 0 ||
-        (global_system_variables.thread_handling == SCHEDULER_POOL_OF_THREADS
-         && !HAVE_POOL_OF_THREADS))
-    {
-      /* purecov: begin tested */
-      fprintf(stderr,"Unknown/unsupported thread-handling: %s\n",argument);
-      exit(1);
-      /* purecov: end */
-    }
+    global_system_variables.thread_handling=
+      find_type_or_exit(argument, &thread_handling_typelib, opt->name);
     break;
   }
   case OPT_FT_BOOLEAN_SYNTAX:

sql/net_serv.cc

@@ -298,7 +298,7 @@ void net_clear(NET *net, my_bool clear_buffer)
       {
         DBUG_PRINT("info",("skipped %d bytes from file: %s",
                            count, vio_description(net->vio)));
-#if defined(EXTRA_DEBUG) && (MYSQL_VERSION_ID < 51000)
+#if defined(EXTRA_DEBUG) && (MYSQL_VERSION_ID < 50100)
         fprintf(stderr,"Error: net_clear() skipped %d bytes from file: %s\n",
                 count, vio_description(net->vio));
 #endif