Test more decryption corner cases.

src/tests/decrypt.vtc

@@ -80,6 +80,14 @@ server s1 {
 	    -hdr "Content-Length: 21"
 	sendhex "23 50 6c c6 d1 6d b6 5b f7 bb f3 a8 f7 8c 67 9b"
 	sendhex "00 00 10 00 00"
+
+	# No Content-Encoding header, VFP decrypt bypassed.
+	rxreq
+	txresp -body {foo bar baz quux}
+
+	# Content-Encoding header is not aes128gcm, VFP decrypt bypassed.
+	rxreq
+	txresp -gzipbody {foo bar baz quux}
 } -start
 
 logexpect l1 -v v1 -d 0 -g vxid -q "VfpAcct" {
@@ -88,6 +96,14 @@ logexpect l1 -v v1 -d 0 -g vxid -q "VfpAcct" {
 	expect 0 = Debug	{^ece_decrypt: record size 4096$}
 	expect * = VfpAcct	{^ece_decrypt \d+ 0$}
 	expect * = End
+
+	expect 0 * Begin	bereq
+	expect * = VfpAcct	{^ece_decrypt 0 0$}
+	expect * = End
+
+	expect 0 * Begin	bereq
+	expect * = VfpAcct	{^ece_decrypt 0 0$}
+	expect * = End
 } -start
 
 client c1 {
@@ -96,6 +112,17 @@ client c1 {
 	expect resp.status == 200
 	expect resp.http.Content-Encoding == <undef>
 	expect resp.bodylen == 0
+
+	txreq
+	rxresp
+	expect resp.status == 200
+	expect resp.http.Content-Encoding == <undef>
+	expect resp.body == {foo bar baz quux}
+
+	txreq
+	rxresp
+	expect resp.status == 200
+	expect resp.http.Content-Encoding == gzip
 } -run
 
 logexpect l1 -wait