Update with more elaborate commit comment, hopefully formatted properly.

Am 06.07.2021 um 16:09 schrieb Corinna Vinschen:
> Hi Thomas,
>
> On Jul  3 18:19, Thomas Wolff wrote:
>> xterm 368 and mintty 3.5.1 implement a new feature to support notification
>> of terminal scaling via font zooming also if the terminal text dimensions
>> (rows/columns) stay unchanged, using ioctl(TIOCSWINSZ), raising SIGWINCH.
>> This does not work in cygwin currently. The attached patch fixes that.
>> Thomas
> Can you please put the describing text into the commit message?
>
>
> Thanks,
> Corinna