Increase vsl buffer for tests with a lot of debug

and check that the setting is actually applied (it is).

src/tests/permutations-error.vtc

@@ -42,6 +42,7 @@ varnish v1 -arg "-a 127.0.0.1:0 -a self=${tmpdir}/v1.sock,mode=777" \
 	-arg "-p between_bytes_timeout=5" \
 	-arg "-p backend_idle_timeout=1" \
 	-arg "-p thread_pool_min=128" \
+	-arg "-l 80m" \
 	-vcl+backend {
 	import ${vmod_pesi};
 	import ${vmod_pesi_debug};

src/tests/permutations.vtc

@@ -42,6 +42,7 @@ varnish v1 -arg "-a 127.0.0.1:0 -a self=${tmpdir}/v1.sock,mode=777" \
 	-arg "-p between_bytes_timeout=5" \
 	-arg "-p backend_idle_timeout=1" \
 	-arg "-p thread_pool_min=128" \
+	-arg "-l 80m" \
 	-vcl+backend {
 	import ${vmod_pesi};
 	import ${vmod_pesi_debug};
@@ -150,6 +151,7 @@ varnish v1 -arg "-a 127.0.0.1:0 -a self=${tmpdir}/v1.sock,mode=777" \
         }
 } -start
 
+varnish v1 -cliok "param.show vsl_space"
 
 # This masks out most of the VSL to push the output size under the 2MB
 # buffer size set for varnishtest in src/Makefile.am.