More SSL stuff (still doesn't work :/).

source/mijin/io/stream.hpp

@@ -70,6 +70,7 @@ enum class [[nodiscard]] StreamError
     NOT_SUPPORTED     = 2,
     CONNECTION_CLOSED = 3,
     PROTOCOL_ERROR    = 4,
+    WOULD_BLOCK       = 5,
     UNKNOWN_ERROR     = -1
 };
 
@@ -434,6 +435,8 @@ inline const char* errorName(StreamError error) noexcept
             return "connection closed";
         case StreamError::PROTOCOL_ERROR:
             return "protocol error";
+        case StreamError::WOULD_BLOCK:
+            return "would block";
         case StreamError::UNKNOWN_ERROR:
             return "unknown error";
     }