[CentOS] Install Bind with gss-spnego enabled

CentOS 7.1503 installed.
Installed Samba 4 from sernet: Version 4.1.17-SerNet-RedHat-11.el7 (to be
configured).

The samba wiki Readme First page states, "Some distributions like . . . Red
Hat Enterprise Linux (and clones), ship BIND9 packages with disabled
GSS-SPNEGO option, which is required for signed DNS updates when using BIND
as DNS backend on your Samba DC. This circumstance requires to self compile
BIND9."

Is there any way to use a yum command to install Bind9 with gss-spnego
enabled?

I'm worried about installing from source and creating future problems when
trying to update other CentOS packages that may be affected by the source
install of Bind9. Is it safe to obtain a bind9 source tarball for install
on an rpm-based CentOS 7 server?

If anyone has installed Bind for use with Samba 4 on CentOS 7, please let
me know what worked.

Thanks for your time and patience.