+25 October 2017: Ralph
+ - Fixed libunbound manual typo.
+
24 October 2017: Ralph
- Update B root ipv4 address.
It can be created and deleted at any time. Creating it anew removes any
previous configuration (such as trusted keys) and clears any cached results.
.P
-The functions are thread\-safe, and a context an be used in a threaded (as
+The functions are thread\-safe, and a context can be used in a threaded (as
well as in a non\-threaded) environment. Also resolution (and validation)
can be performed blocking and non\-blocking (also called asynchronous).
The async method returns from the call immediately, so that processing