net-proxy/haproxy: prepare for split 9999 on different major versions

Signed-off-by: Robin H. Johnson <robbat2@gentoo.org>

diff --git a/net-proxy/haproxy/haproxy-9999.ebuild b/net-proxy/haproxy/haproxy-1.6.9999.ebuild
similarity index 100%
rename from net-proxy/haproxy/haproxy-9999.ebuild
rename to net-proxy/haproxy/haproxy-1.6.9999.ebuild