secpoll: Replace ~ with _, too

Debian backports versions use '~' in the version number.
make set-version-recursor complain if invoked incorrectly
Merge branch 'master' of github.com:PowerDNS/pdns
Merge branch 'master' of github.com:PowerDNS/pdns
Fix a error that sneaked into 948280123c3bf87b1d6a06c7cb563f0801062fdf
Merge pull request #1894 from tuxis-ie/fix-sqlite-typo

Fix a error that sneaked into 948280123c3bf87b1d6a06c7cb563f0801062fdf
Merge pull request #1887 from zeha/secpoll-chars

secpoll: Replace ~ with _, too
make our AtomicCounter 64 bit on 64 bit machines
Our "StatBag" statistics class was 1) 32 bit 2) heavily locked 3) still allowed for lock-free operations for high speed counters.
This commit 1) makes the StatBag 64 bit on 64 bit systems, 2) removes all locks and 3) has gone AtomicCounter 'native'
The upshot of this is that 64 bit users will suddenly get 64 bit counters. A second upshot is that multicore systems should now see consistent statistics again.
One important thing that changed is that the StatBag class used to be completely thread safe, and now it no longer is. You can't declare new counters while the StatBag is in use. This should not be happening, but you never know.
Finally, there is now a StatBag unit test.
Merge branch 'master' of github.com:PowerDNS/pdns
actually writing some unit tests for the new 64 bit capable AtomicCounter found a pile of bugs!
a 32 bit regression test failure we don't understand..
this should fix our unit tests
disabling test if test environment does not define things we need to know..
for now disable building of httpapi documents which are wrong
remove some stale empty files, add inspirational quote, make sure we build 'running.md'
update index of documentation add documentation documentation (yo)
Add IPv6 hints for {b,c}.root-servers.net
Fix some wording, some style and a typo
fix another style issue in the docs about the docs