Add flags to control max connections (set to 256k vs 64k default) and TCP
established timeout (set to 1 day vs 5 day default). Flags can be set to 0 to
mean "don't change it".
This is only set at startup, and not wrapped in a rectifier loop.
Tested manually.
Check to make sure there is not an alphanumeric character immeditely
before or after the 'flag'. It there is an alphanumeric character then
this is obviously not actually the flag we care about. For example if
the project declares a flag "valid-name" but the regex finds something
like "invalid_name" we should not match. Clearly this "invalid_name" is
not actually a wrong usage of the "valid-name" flag.
