Revert "Fixed typo in the option setting"

This reverts commit 76ef3f0ac39be8ebbfa179d66c469c5613f20cfc.
Revert "TCP: Do not send options, if the field is empty. Cfr: #143"

This reverts commit 61ef8754f78c333f730d9376c2730b66e69a985b.
Revert "Attempt for a fix for #143."

This reverts commit 20bcb20239c26891d2b1e75f348c8c46dfd12831.