* Netmcore_heap.mli: allowing to [add] bigarrays. New
function [add_string] for creating uninitialized strings on
heaps. New function [add_immutable] for retaining value sharing.
* Netsys_mem: New options [Copy_conditionally] and [Keep_atom]
for function [init_value].
* netsys_c_subprocess.c: fixing a deadlock issue
(when calling commands via the Shell library)
* Netdate: Fix interpretation of the ~localzone argument
of several functions. Now the timezone is assumed for the
target time, not the calling time
* Netdate: Adding localization
* Netconversion: Adding functions for converting to lowercase/
uppercase/titlecase, and for case-insensitive comparison
* Fix Netfs.copy: When the copy method throws EXDEV, it is
fallen back to a streaming-type copy
* Several fixes for OS X
* Daemonizer: now using a signal for waiting until the children
are up and running
* Fixes for OCaml-4.00
* Better endianness check as suggested by Matias Giovannini
* Fixing handling of `Recv_send_implied sockets in
socket_multiplex_controller
* netzip: it is now autodetected whether the camlzip library
is available under the findlib name "zip" or "camlzip"
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