Project restracture

See merge request zdvresearch_bsc/adafs!135

change CMake project name `ifs` -> `GekkoFS`

the `ifs_test` folder have been renamed simply `test`

All the produced binary are now named `gkfs_*` instead of `ifs_*`

Fix various log messages

See merge request zdvresearch_bsc/adafs!133

CMake: don't use custom format for log messages

See merge request zdvresearch_bsc/adafs!131

Add MIT License

See merge request zdvresearch_bsc/adafs!132

Don't use custom format for the build type log entry.

update libfabric to v1.7.0

See merge request zdvresearch_bsc/adafs!126

use print function for python3 compatiblity

See merge request zdvresearch_bsc/adafs!129

* Use the print function to make the startup and shutdown script python3
  compatibility.

Cleanup unused configuration constant

See merge request zdvresearch_bsc/adafs!128

Add support for `AT_FDCWD` in some intercepted functions

Closes #88

See merge request zdvresearch_bsc/adafs!127

Some of the glibc intercepted functions,
that are accepting the directory file descriptor,
where still using legacy code to relativize the input path.

Disable interception during library shutdown

See merge request zdvresearch_bsc/adafs!114

If we intercept function during shutdown we could try to access the
internal file map that has been already freed.

This woun't affect performance at runtime since we are always checking
only one boolean flags on every interception as before.

On the other hand should sppedup the shutdown of the library, because we
disable the interception of glibc library call before performing the
shutdown routines.

Update mercury and drop margo handles patch

See merge request zdvresearch_bsc/adafs!125

Since mercury fixed the issue on their code [1], we can drop the
temporary patch we were using to avoid handles reset.

Due to the mercury fix The follwing two issues have been solved:
 - Mercury: https://github.com/mercury-hpc/mercury/issues/272
 - Margo: https://xgitlab.cels.anl.gov/sds/margo/issues/47

[1]: https://github.com/mercury-hpc/mercury/commit/9512b8b04c265645f95fd99f3b9c015e836c0347

improved statfs and statvfs

See merge request zdvresearch_bsc/adafs!110

 - improved statfs system call
 - intercepted statvfs library call

Both of the above function now report the aggregated real size
of all the data-nodes.

You can test this with `df "/tmp/gekkofs_mountpoint"` command

mercury changed again its interface.
Before was `ofi+sockets://fi_sockaddr_in://<IP>:<port>` but now
it only works if we omit the intermediate protocol `ofi+sockets://<IP>:<port>`

They fixed a potential race condition:

https://github.com/mercury-hpc/mercury/commit/a421ea3072c79b2edb6d4d9d2bdaf179b5ef14f3

Margo fix handle cache

Closes #85

See merge request zdvresearch_bsc/adafs!116

See: https://xgitlab.cels.anl.gov/sds/margo/issues/47

Workaround must be reverted once fixed.

drop margo init patch

See merge request zdvresearch_bsc/adafs!115