FB8-96: Remove special formatting for user name when writing to audit…

… plugin log (facebook#948) (facebook#948)

Summary:
Jira issue: https://jira.percona.com/browse/FB8-96

Reference patch: facebook@3b47dae
Reference patch: facebook@87e0683
Pull Request resolved: facebook#948

Reviewed By: lloyd

Differential Revision: D13941932

Pulled By: lth

sql/sql_audit.cc

@@ -962,7 +962,6 @@ int mysql_event_tracking_general_notify(
     const char *subclass_name, int error_code, const char *msg,
     size_t msg_len) {
   mysql_event_tracking_general_data event;
-  char user_buff[MAX_USER_HOST_SIZE];
 
   assert(thd);
 
@@ -979,8 +978,8 @@ int mysql_event_tracking_general_notify(
   auto ip = sctx->ip();
   auto host = sctx->host();
 
-  event.user.str = user_buff;
-  event.user.length = make_user_name(sctx, user_buff);
+  event.user.str = sctx->user().str;
+  event.user.length = sctx->user().str ? sctx->user().length : 0;
   event.ip = {ip.str, ip.length};
   event.host = {host.str, host.length};