Update interop tests to default configuration

Removed SSLv3 from the default tests in compat.sh, and adapted the test
cases in all.sh to include an additional SSLv3 regression test suite.
diff --git a/tests/compat.sh b/tests/compat.sh
index 4b43e33..a333a19 100755
--- a/tests/compat.sh
+++ b/tests/compat.sh
@@ -45,7 +45,7 @@
 fi
 
 # default values for options
-MODES="ssl3 tls1 tls1_1 tls1_2 dtls1 dtls1_2"
+MODES="tls1 tls1_1 tls1_2 dtls1 dtls1_2"
 VERIFIES="NO YES"
 TYPES="ECDSA RSA PSK"
 FILTER=""