headers: Add various missing G_DISABLE_DEPRECATED guards

As pointed out by gtk-doc, these are all symbols which have been marked
as deprecated, but which aren’t protected by a deprecation guard. We
can’t use G_DEPRECATED_IN_* for them, as they are all non-function
symbols. Instead, wrap them in #ifndef G_DISABLE_DEPRECATED.

In some cases, we also need to wrap one or two functions which use the
deprecated types in G_DISABLE_DEPRECATED too.

Signed-off-by: Philip Withnall <withnall@endlessm.com>

gio/gioenums.h

@@ -1603,6 +1603,7 @@ typedef enum {
   G_TLS_AUTHENTICATION_REQUIRED
 } GTlsAuthenticationMode;
 
+#ifndef G_DISABLE_DEPRECATED
 /**
  * GTlsRehandshakeMode:
  * @G_TLS_REHANDSHAKE_NEVER: Never allow rehandshaking
@@ -1623,6 +1624,7 @@ typedef enum {
   G_TLS_REHANDSHAKE_SAFELY,
   G_TLS_REHANDSHAKE_UNSAFELY
 } GTlsRehandshakeMode;
+#endif  /* !G_DISABLE_DEPRECATED */
 
 /**
  * GTlsPasswordFlags: