This one is not going to be merged, the reasons:
* first see my comment in the other PR: https://github.com/kamailio/kamailio/pull/1903#issuecomment-475956037 * using separate `=~` has not benefits, actually can be slower than using a single regex matching. If it gets too long, could make sense split in groups of matches to avoid long lines and have better readibility, but not one match per possible user-agent.