REGTEST: make map_regm_with_backref require 1.7

map_regm was only introduced in 1.7, I don't know why the require field
was set to 1.6, probably tha the test evolved and didn't start with
map_regm.

(cherry picked from commit 73cc5457cb7608b5b7f797d8d78d655a6fcab9eb)
Signed-off-by: Willy Tarreau <w@1wt.eu>
(cherry picked from commit 091a9a865ea738cc323bf533c15b125b4eac19f2)
Signed-off-by: Willy Tarreau <w@1wt.eu>
(cherry picked from commit e19f79aeabaa87f84f136ec0c008c7609896de1a)
Signed-off-by: Willy Tarreau <w@1wt.eu>
diff --git a/reg-tests/http-rules/map_regm_with_backref.vtc b/reg-tests/http-rules/map_regm_with_backref.vtc
index 502e8d3..54b5c91 100644
--- a/reg-tests/http-rules/map_regm_with_backref.vtc
+++ b/reg-tests/http-rules/map_regm_with_backref.vtc
@@ -10,7 +10,7 @@
 varnishtest "map_regm get_trash_chunk test"
 feature ignore_unknown_macro
 
-#REQUIRE_VERSION=1.6
+#REQUIRE_VERSION=1.7
 #REGTEST_TYPE=bug
 
 syslog S1 -level notice {