Merge pull request #10048 from Habbie/oss-dns-vulns

docs: link to OARC oss-vulns list; add security policy to dnsdist; include GPL license; some minor refactoring

diff --combined .github/actions/spell-check/expect.txt
index 5ec5917ecf80559b0125e9d26349d612176f2c7b,cde903658984ef8ea2587c9ef3d21a89fade4c0a..6b51066ed366397eac04733c80556dbaa4955c83
--- 1/.github/actions/spell-check/expect.txt
--- 2/.github/actions/spell-check/expect.txt
+++ b/.github/actions/spell-check/expect.txt
@@@ -152,7 -152,6 +152,7 @@@ BADTRUN
  BADVERS
  baf
  Baj
 +Bakhos
  Bakker
  Baltus
  basedn
@@@ -741,7 -740,6 +741,7 @@@ geobacken
  geoip
  geoipbackend
  geolocated
 +Georgeto
  Gergely
  Gerritsen
  Gervai
@@@ -1351,7 -1349,6 +1351,7 @@@ nsupdat
  nta
  ntei
  ntlworld
 +Nuitari
  nullptr
  NULs
  NUMA
@@@ -1900,7 -1897,6 +1900,7 @@@ submitter
  subnetmask
  sudo
  suffixmatchtree
 +Sukhbir
  supermaster
  supermasterbackend
  supernotification
@@@ -2121,6 -2117,7 +2121,7 @@@ Volke
  voxel
  Vranken
  Vsgoi
+ vulns
  Vwgbclzx
  VY
  vzu