change validHostTypes to 0x13
Merge branch 'hotfix/3973'

Close #3973
Merge pull request #3980 from samsonasik/fix/hosttype

change HOST_DNS_OR_IPV4_OR_IPV6 to 0x13 for $validHostTypes
[#3980] Created new constant

- per @DASPRiD
- evaluates to 0x13 (10011)
- name describes its purpose
Merge branch 'hotfix/3980' into develop

Forward port #3980