Add dump_prefs() for instrospection.
Make prefs_get_bool a little more clear.
In get_property don't assume that the Mac realloc(NULL, 0); returns
non-NULL. We shouldn't depend on implementation-defined behavior too
much.
Add more commentary in various spots.
Add TARGETS in the TARGETS response. I don't know why some X11 apps
do this, but it could be something that some weird toolkit/app tests
for.
In reload_preferences add preferences synchronization, so that xpbproxy
reloads the preferences, and picks up any changes.
Fix a typo/misspelling of the sync_clipboard_to_pasteboard preference.
(cherry picked from commit 165cbbb90c)