010-security.debian.org.conf: explicitly bind to localhost

010-security.debian.org.conf: explicitly bind to localhost

On hosts having services on different IP addresses, *:80 is not enough
to run the security vhost on localhost, as other services might also
explicitly bind to localhost. This breaks mirror-health check.

For example on schmelzer.d.o:

010-archive.debian.org.conf
  <VirtualHost 217.196.149.234:80 [2a02:16a8:dc41:100::234]:80>

010-debug.mirrors.debian.org.conf
  <VirtualHost 217.196.149.232:80 [2a02:16a8:dc41:100::232]:80 127.0.0.1:80 [::1]:80 >

010-ftp.debian.org.conf
  <VirtualHost 217.196.149.232:80 [2a02:16a8:dc41:100::232]:80 127.0.0.1:80 [::1]:80 >

010-security.debian.org.conf
  <VirtualHost *:80>

Without this fix, it means that a request to security.backend.mirrors.d.o
on localhost ends up in the debug.mirrors.d.o vhost, and is thus
answered as 404.