old_contents: 
  LONG_PASSWORD = 1
  FOUND_ROWS = 1 << 1
  LONG_FLAG = 1 << 2
  CONNECT_WITH_DB = 1 << 3
  NO_SCHEMA = 1 << 4
  COMPRESS = 1 << 5
  ODBC = 1 << 6
  LOCAL_FILES = 1 << 7
  IGNORE_SPACE = 1 << 8
  PROTOCOL_41 = 1 << 9
  INTERACTIVE = 1 << 10
  SSL = 1 << 11
  IGNORE_SIGPIPE = 1 << 12
  TRANSACTIONS  = 1 << 13
  SECURE_CONNECTION = 1 << 15
  MULTI_STATEMENTS = 1 << 16
  MULTI_RESULTS = 1 << 17
  CLIENT_DEPRECATE_EOF = 1 << 24
  CAPABILITIES = LONG_PASSWORD|LONG_FLAG|TRANSACTIONS| \
      PROTOCOL_41|SECURE_CONNECTION
  
new_contents: 
  LONG_PASSWORD = 1
  FOUND_ROWS = 1 << 1
  LONG_FLAG = 1 << 2
  CONNECT_WITH_DB = 1 << 3
  NO_SCHEMA = 1 << 4
  COMPRESS = 1 << 5
  ODBC = 1 << 6
  LOCAL_FILES = 1 << 7
  IGNORE_SPACE = 1 << 8
  PROTOCOL_41 = 1 << 9
  INTERACTIVE = 1 << 10
  SSL = 1 << 11
  IGNORE_SIGPIPE = 1 << 12
  TRANSACTIONS  = 1 << 13
  SECURE_CONNECTION = 1 << 15
  MULTI_STATEMENTS = 1 << 16
  MULTI_RESULTS = 1 << 17
  PS_MULTI_RESULTS = 1 << 18
  PLUGIN_AUTH = 1 << 19
  PLUGIN_AUTH_LENENC_CLIENT_DATA = 1 << 21
  CLIENT_DEPRECATE_EOF = 1 << 24
  
  CAPABILITIES = LONG_PASSWORD | LONG_FLAG | TRANSACTIONS | PROTOCOL_41 | SECURE_CONNECTION
  
subject: add client capability flag