* Replaces checks for fork, etc. with H5_HAVE_UNISTD_H
Code previously checked for individual POSIX API calls using
H5_HAVE_FORK, etc. The calls we use have been standardized for
decades and available via unistd.h.
Some test messages that were missing when tests are skipped
due to a lack of unistd.h were also added.
The configure checks for individual POSIX API calls will be
removed in a later commit.
* Stupid formatter
* Modify temporary rpath for testing in java example scripts.
* Update URL in source file Copyright headers for web copy of COPYING
file - src and test directories.
* "Simultaneous and equivalent" Read-Write and Write-Only channels for
file I/O.
* Only supports drivers with the H5FD_FEAT_DEFAULT_VFD_COMPATIBLE flag for
now, preventing issues with multi-file drivers.
Add Mirror VFD to library.
* Write-only operations over a network.
* Uses TCP/IP sockets.
* Server and auxiliary server-shutdown programs provided in a new directory,
`utils/mirror_vfd`.
* Automated testing via loopback ("remote" of localhost).
