Method alloc_auth

sql/sql_acl.cc:198–201

  longlong password_lifetime;

  bool alloc_auth(MEM_ROOT *root, uint n)
  {
    return !(auth= (AUTH*) alloc_root(root, (nauth= n)*sizeof(AUTH)));
  }
  Lex_ident_host hostname() const
  {
    DBUG_ASSERT(host.hostname[hostname_length] == '\0');