Use FileOptimizer (https://nikkhokkho.sourceforge.io/static.php?page=FileOptimizer) to losslessly compress all JPG, PNG, and PDF images without reducing their quality. Signed-off-by: Tomasz Wilczyński <twilczynski@naver.com>
Skip-check: authors pr-build GitHub-Pull-Request: https://github.com/syncthing/syncthing/pull/3358