Also,
- keep exhaustive tests because they test something different than the regular
tests and finish faster than the regular tests
- remove unnecessary options. None of the modules are experimental (anymore) and
the modules are enabled by default except recovery. This is demonstrated by the
output of the configurePhase with this commit:
```
Build Options:
with tests = yes
module ecdh = yes
module recovery = yes
module extrakeys = yes
module schnorrsig = yes
```
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