[web] Fix HEAD request handling (closes #3677949)
Don't special-case HEAD in CubicWebRequestBase.is_client_cache_valid so
we don't return garbage. HEAD is supposed to return the actual headers
that a GET would return, which we can't do if we bypass all the normal
cubicweb logic. In particular, we no longer always return 200, and
return the right Content-Length/Content-Type/...
/var/log/cubicweb/*.log {
weekly
missingok
rotate 10
compress
delaycompress
notifempty
create 640 root adm
sharedscripts
postrotate
if [ -x /usr/sbin/invoke-rc.d ]; then \
invoke-rc.d cubicweb reload > /dev/null 2>&1; \
else \
/etc/init.d/cubicweb reload > /dev/null 2>&1; \
fi; \
endscript
}