docs: def special_case_mysql(self, u, kwargs):
          """For mysql, take max_idle out of the query arguments, and
          use its value for pool_recycle.  Also, force use_unicode and
          charset to be True and 'utf8', failing if they were set to
          anything else."""
  
          kwargs['pool_recycle'] = int(u.query.pop('max_idle', 3600))
  
          # default to the MyISAM storage engine
          storage_engine = u.query.pop('storage_engine', 'MyISAM')
          kwargs['connect_args'] = {
              'init_command': 'SET default_storage_engine=%s' % storage_engine,
          }
  
          if 'use_unicode' in u.query:
              if u.query['use_unicode'] != "True":
                  raise TypeError("Buildbot requires use_unicode=True " +
                                  "(and adds it automatically)")
          else:
              u.query['use_unicode'] = True
  
          if 'charset' in u.query:
              if u.query['charset'] != "utf8":
                  raise TypeError("Buildbot requires charset=utf8 " +
                                  "(and adds it automatically)")
          else:
              u.query['charset'] = 'utf8'
  
          return u, kwargs, None