REGTESTS: restrict_req_hdr_names: Extend supported versions

This reg-test was backported as far as 2.0. Thus, extend supported versions
accordingly.

This patch must be backported as far as 2.0.

(cherry picked from commit fdf693477a4efed4625b7d61f0f9bd655f562dbb)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>
(cherry picked from commit cc7b62db3d1d40320c8c83306423874f7713da20)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>
(cherry picked from commit cfdca0e9dea06de06170398200a2355ac6674832)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>
diff --git a/reg-tests/http-rules/restrict_req_hdr_names.vtc b/reg-tests/http-rules/restrict_req_hdr_names.vtc
index a3a9593..071b9bd 100644
--- a/reg-tests/http-rules/restrict_req_hdr_names.vtc
+++ b/reg-tests/http-rules/restrict_req_hdr_names.vtc
@@ -1,5 +1,5 @@
 varnishtest "http-restrict-req-hdr-names option tests"
-feature cmd "$HAPROXY_PROGRAM -cc 'version_atleast(2.6-dev0)'"
+feature cmd "$HAPROXY_PROGRAM -cc 'version_atleast(2.0-dev0)'"
 
 # This config tests "http-restrict-req-hdr-names" option