Fixes from Erik Hovland:

cli-authpubkey.c:
    fix leak of keybuf

cli-kex.c:
    fix leak of fingerprint fp

cli-service.c:
    remove commented out code

dropbearkey.c:
    don't attepmt to free NULL key on failure

common-kex.c:
    only free key if it is initialised

keyimport.c:
    remove dead encrypted-key code
    don't leak a FILE* loading OpenSSH keys

rsa.c, dss.c:
    check return values for some libtommath functions

svr-kex.c:
    check return value retrieving DH kex mpint

svr-tcpfwd.c:
    fix null-dereference if remote tcp forward request fails

tcp-accept.c:
    don't incorrectly free the tcpinfo var

--HG--
extra : convert_revision : 640a55bc710cbaa6d212453c750026c770e19193

svr-kex.c

@@ -52,7 +52,9 @@ void recv_msg_kexdh_init() {
 	}
 
 	m_mp_init(&dh_e);
-	buf_getmpint(ses.payload, &dh_e);
+	if (buf_getmpint(ses.payload, &dh_e) != DROPBEAR_SUCCESS) {
+		dropbear_exit("Failed to get kex value");
+	}
 
 	send_msg_kexdh_reply(&dh_e);