Merge branch 'master' into newmc

diff --cc app.psgi
index 290ef4b5fb4d41e145032d7fc81599ba03fc889e,f7c85ffec3149dbd1bba33486039966bb74dfd92..eee1ad7b69211a6afa50e1d444c6a6c1ded1957f
--- 1/app.psgi
--- 2/app.psgi
+++ b/app.psgi
@@@ -44,6 -44,7 +44,7 @@@ sub add_headers 
                my $resp = $app->($_[0]);
                my $hdrs = Plack::Util::headers($resp->[1]);
                $hdrs->set('Content-Security-Policy', CONTENT_SECURITY_POLICY);
 -              $hdrs->set('Link', '</static/cyborg.css>; rel=stylesheet') if $hdrs->get('Content-Type') =~ m,^text/html,;
++              $hdrs->set('Link', '<https://static.mindcoding.ro/static/slate.css>; rel=stylesheet') if $hdrs->get('Content-Type') =~ m,^text/html,;
                $hdrs->set('Cache-Control', 'public, max-age=604800') if $_[0]->{PATH_INFO} =~ qr,^/static/,;
                $resp->[1] = $hdrs->headers;
                $resp;