package/haproxy: security bump to version 2.1.4

- Fix CVE-2020-11100: In hpack_dht_insert in hpack-tbl.c in the HPACK
  decoder in HAProxy 1.8 through 2.x before 2.1.4, a remote attacker can
  write arbitrary bytes around a certain location on the heap via a
  crafted HTTP/2 request, possibly causing remote code execution.
- Update indentation of hash file (two spaces)

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>