Fix warnings and build issues

openssl/Cargo.toml

@@ -23,7 +23,7 @@ version = "0.5.0"
 libc = "0.1"
 
 [dev-dependencies]
-rustc-serialize = "0.2"
+rustc-serialize = "0.3"
 
 [dependencies]
 bitflags = "0.1.1"

openssl/src/lib.rs

@@ -1,5 +1,4 @@
-#![feature(unsafe_destructor, core, io, std_misc, net, path, unique)]
-#![cfg_attr(test, feature(net))]
+#![feature(unsafe_destructor, core, io, std_misc, unique)]
 #![doc(html_root_url="https://sfackler.github.io/rust-openssl/doc/openssl")]
 
 #[macro_use]

openssl/src/x509/mod.rs

@@ -521,7 +521,7 @@ make_validation_error!(X509_V_OK,
 #[test]
 fn test_negative_serial() {
     // I guess that's enough to get a random negative number
-    for _ in range(0, 1000) {
+    for _ in 0..1000 {
         assert!(X509Generator::random_serial() > 0, "All serials should be positive");
     }
 }