fixed: memleak in --help, sigsegv on shutdown

Ingo's patch:
WL#2936 - Falcon & MySQL plugin interface: server variables
Added initialization for plugin string variables with their
default values.
Added deallocation of string values before a plugin and its
variables is deleted.
Added examples to plugin_example

1 files changed, 14 insertions, 2 deletions

diff --git a/plugin/fulltext/plugin_example.c b/plugin/fulltext/plugin_example.c
index 67c16a91268..70022da2cc4 100644
--- a/plugin/fulltext/plugin_example.c
+++ b/plugin/fulltext/plugin_example.c
@@ -225,16 +225,28 @@ static char     *sysvar_two_value;
 static MYSQL_SYSVAR_LONG(simple_sysvar_one, sysvar_one_value,
   PLUGIN_VAR_RQCMDARG,
   "Simple fulltext parser example system variable number one. Give a number.",
-  NULL, NULL, 100L, 10L, ~0L, 0);
+  NULL, NULL, 77L, 7L, 777L, 0);
 
 static MYSQL_SYSVAR_STR(simple_sysvar_two, sysvar_two_value,
   PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_MEMALLOC,
   "Simple fulltext parser example system variable number two. Give a string.",
-  NULL, NULL, NULL);
+  NULL, NULL, "simple sysvar two default");
+
+static MYSQL_THDVAR_LONG(simple_thdvar_one,
+  PLUGIN_VAR_RQCMDARG,
+  "Simple fulltext parser example thread variable number one. Give a number.",
+  NULL, NULL, 88L, 8L, 888L, 0);
+
+static MYSQL_THDVAR_STR(simple_thdvar_two,
+  PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_MEMALLOC,
+  "Simple fulltext parser example thread variable number two. Give a string.",
+  NULL, NULL, "simple thdvar two default");
 
 static struct st_mysql_sys_var* simple_system_variables[]= {
   MYSQL_SYSVAR(simple_sysvar_one),
   MYSQL_SYSVAR(simple_sysvar_two),
+  MYSQL_SYSVAR(simple_thdvar_one),
+  MYSQL_SYSVAR(simple_thdvar_two),
   NULL
 };