Bugfixes:
* Fix incorrect `compressed datagram contains loop' error.
* Actually compile shared libraries by default !
+ * Fix adnsresfilter usage message to include correct default timeout.
General Improvements:
- * adnshost and adnslogres have options for overriding configuration.
+ * adnshost, adnslogres, adnsresfilter have options for config override.
+ * adnsresfilter has --debug option.
* Improvements to adnslogres (incl. new -c option) from Tony Finch.
* Regression tests now include `adnshost' invocations.
* Test cancellation both before and after query completion.