When reading cookies from a file, only run remove_expired once

[clbr]

Combined with #2440, this drops the cookie load time for 8k cookies from 178ms to 15ms. All tests pass.

[bagder]

Thanks, this looks like a great improvement. Try make checksrc to see the issues the CI reports:

./setopt.c:784:86: warning: Longer than 79 columns (LONGLINE)
           Curl_cookie_add(data, data->cookies, TRUE, FALSE, argptr + 11, NULL, NULL);
./setopt.c:788:82: warning: Longer than 79 columns (LONGLINE)
           Curl_cookie_add(data, data->cookies, FALSE, FALSE, argptr, NULL, NULL);

[bagder]

Nit: we put the conditional block on a new line below the if() line, never on the same!

[bagder]

Thanks!