nail: unbreak compilation

disabling SSLv2 and SSLv3 caused nail to break, fixed this
some of our snapshot builders don't have CVS, switch to Debian as source

Signed-off-by: Steven Barth <steven@midlink.org>

mail/nail/patches/100-handle-openssl-without-sslv2.patch

@@ -0,0 +1,16 @@
+--- a/openssl.c
++++ b/openssl.c
+@@ -216,9 +216,12 @@ ssl_select_method(const char *uhp)
+ 
+ 	cp = ssl_method_string(uhp);
+ 	if (cp != NULL) {
++#ifndef OPENSSL_NO_SSL2
+ 		if (equal(cp, "ssl2"))
+ 			method = SSLv2_client_method();
+-		else if (equal(cp, "ssl3"))
++		else
++#endif
++		if (equal(cp, "ssl3"))
+ 			method = SSLv3_client_method();
+ 		else if (equal(cp, "tls1"))
+ 			method = TLSv1_client_method();