main: Turn off more silly deprecation warnings

We can't fix Paramiko, and these warnings just create tons of confusion. Turn
them off.

Change-Id: I907107f904e3a76555da43c8b624c5d50601b4b9
diff --git a/mdt/main.py b/mdt/main.py
index 36b2818..8ae6bc6 100755
--- a/mdt/main.py
+++ b/mdt/main.py
@@ -42,14 +42,21 @@
 import mdt
 
 
-# Stop programmer's warnings about CryptographyDeprecations for silly APIs like
-# sign and verify. FIXME(jtgans): Remove this once paramiko updates their public
-# releases in Debian. See also https://github.com/paramiko/paramiko/issues/1386
+# Stop deprecation warnings from Python's crypto libs for silly APIs like sign
+# and verify and ecdh junk that we don't even use, nor can we fix.
 import warnings
 warnings.filterwarnings(
     action='ignore',
     message='.*signer and verifier have been deprecated.*',
     module='.*paramiko.rsakey')
+warnings.filterwarnings(
+    action='ignore',
+    message='.*encode_point has been deprecated on EllipticCurvePublicNumbers.*',
+    module='.*paramiko.kex_ecdh_nist')
+warnings.filterwarnings(
+    action='ignore',
+    message='.*Support for unsafe construction of public numbers.*',
+    module='.*paramiko.kex_ecdh_nist')
 
 
 MDT_USAGE_HELP = '''