[Vortex] [BUG] Possible bug with vortex_connection_remove_on_close_full

[Francis Brosnan Blazquez]

Hi Benoit,

I've updated the axl library API to include two new functions that
allows to implement removal operations by pointer, without taking into
consideration the equal function configured:

   - axl_list_remove_ptr
   - axl_list_unlink_ptr

I've also updated the vortex connection module to make
vortex_connection_remove_on_close_full to use this new function to
ensure the handler configured is *really* removed.

I've also checked the rest of lists created using the
axl_list_always_return_1 function to use axl_list_remove_ptr or
functions that do not relay on the equal function.

Cheers!
-- 
Francis Brosnan Blazquez <francis at aspl.es>
Advanced Software Production Line, S.L.