JmDNS tuning for quick update of TXT record.
Moving CommonConstants to common.
Refactor for a more functional style.
More on JmDNS tuning.
Split 'common/' into commit '71450c7ca1ba5ef70222b19acd5aed2681fa9952'

git-subtree-dir: common
git-subtree-mainline: bf1830f981790675eda9d26b2f6256ce9924d2a5
git-subtree-split: 71450c7ca1ba5ef70222b19acd5aed2681fa9952