Add timestamp of setting an API function to "legacy"
Add timestamp of setting an API function to "legacy"

Timestamps determined by
git blame include/civetweb.h | grep MG_LEGACY_INTERFACE

This is an indication to completely remove the API
function later.

GerHobbelt/civet-webserver,GerHobbelt/civet-webserver,GerHobbelt/civet-webserver,GerHobbelt/civet-webserver,GerHobbelt/civet-webserver,GerHobbelt/civet-webserver