computer: Fix a memory leak

https://bugzilla.gnome.org/show_bug.cgi?id=734695
daemon: Fix a memory leak

https://bugzilla.gnome.org/show_bug.cgi?id=734695
afp: Fix some memory leaks

https://bugzilla.gnome.org/show_bug.cgi?id=734695
dav: Send enumerate success earlier

Send a "success" response earlier when enumerating to allow infos to be
sent incrementally rather than batched up until the end.

https://bugzilla.gnome.org/show_bug.cgi?id=734695
gvfs-save: Allow specifying G_FILE_CREATE_REPLACE_DESTINATION

Allow specifying G_FILE_CREATE_REPLACE_DESTINATION when using gvfs-save
with the -u flag or --unlink.  I chose this because "unlink" represents
what G_FILE_CREATE_REPLACE_DESTINATION does in principle: it unlinks the
destination before replacing it, thereby losing any permissions or other
attributes of the file.

https://bugzilla.gnome.org/show_bug.cgi?id=734695