message: Fix - effecient detection of names with '.'
  also exempt the eosio account from this restriction
diff: @@ -97,10 +97,14 @@ namespace eosiosystem {
  /* no need to parse authorites
  const authority& owner,
  const authority& active*/ ) {
  - auto name_str = eosio::name{newact}.to_string();
  - eosio_assert( name_str.size() == 12 || creator == N(eosio), "account names must be 12 chars long" );
  - eosio_assert( name_str.find_first_of('.') == std::string::npos || creator == N(eosio), "account names cannot contain '.' character");
  + if( creator != _self ) {
  + auto tmp = newact;
  + for( uint32_t i = 0; i < 12; ++i ) {
  + if( tmp & 0x1f ) eosio_assert( false, "name may not contain '.'");
  + tmp >>= 5;
  + }
  + }
  user_resources_table userres( _self, newact);
  