Revert "Updated types for osx (#235)"

This reverts commit 9371bad.

Author: pkittenis

ssh2/c_ssh2.pxd

@@ -54,6 +54,11 @@ cdef extern from "libssh2.h" nogil:
         # Session flags
         LIBSSH2_FLAG_SIGPIPE
         LIBSSH2_FLAG_COMPRESS
+        # Path flags
+        LIBSSH2_FLAG_QUOTE_PATHS
+        # Flags for SK authentication
+        LIBSSH2_SK_PRESENCE_REQUIRED
+        LIBSSH2_SK_VERIFICATION_REQUIRED
 
 
     ctypedef struct_stat libssh2_struct_stat