[tldistro] RedHat Enterprise Linux/Centos 6/7/8

[Bob Tennent]

The texlive/distro.html page doesn't list maintainers for
EL/Centos distros. These are as follows:

EL/Centos 8:  Marek Kasik <mkasik at redhat.com> and Than Ngo <than at redhat.com>
EL/Centos 7:  Than Ngo <than at redhat.com>
EL/Centos 6:  Jindrich Novy <jnovy at redhat.com> and Than Ngo <than at redhat.com>

Perhaps links to 

https://ctan.org/pkg/texlive-dummy-enterprise-linux-8
https://ctan.org/pkg/texlive-dummy-enterprise-linux-7
https://ctan.org/pkg/texlive-dummy-enterprise-linux-6

would be helpful.

Bob T.