Clean up warnings

src/ffi.rs

@@ -1,4 +1,4 @@
-#![allow(non_camel_case_types)]
+#![allow(non_camel_case_types, non_uppercase_statics, non_snake_case)]
 #![allow(dead_code)]
 use libc::{c_void, c_int, c_char, c_ulong, c_long, c_uint, c_uchar, size_t};
 

src/x509/mod.rs

@@ -122,7 +122,7 @@ trait ToStr {
 impl<'a, T: AsStr<'a>> ToStr for Vec<T> {
     fn to_str(&self) -> String {
         self.iter().enumerate().fold(String::new(), |mut acc, (idx, v)| {
-            if idx > 0 { acc.push_char(',') };
+            if idx > 0 { acc.push(',') };
             acc.push_str(v.as_str());
             acc
         })