Updating HAProxy snapshot documentation v1.5.8-13 generated by haproxy-dconv v0.3.1-23

fad7f07 MINOR: sample: add a few basic internal fetches (nbproc, proc, stopping)
Updating HAProxy snapshot documentation v1.6-dev0-142 generated by haproxy-dconv v0.3.1-23

f399b0d MINOR: samples: adds the field converter.
54c4ac8 MINOR: samples: adds the bytes converter.
0f30d26 MINOR: sample: add a few basic internal fetches (nbproc, proc, stopping)