The PSYS driver contained in the EtherCAN archives (psys-2.1.3) has an incompatiblity issue
with kernels >= 3.10.0. To work around this install psys_linux_2.1.4.tgz after the EtherCAN
archive.
This is needed as long as the PSYS component of the EtherCAN archives has not been updated!

2016-03-30:JU: psys_linux_2.1.5.tgz, same workaround, but for kernel 4.x / gcc 5.x (e.g. Ubuntu 16.04)

2017-10-04:MJ: psys_linux_2.1.6.tgz, updated the PSYS driver to be compatible with kernels
	4.14 and following.

2018-04-04:MJ: psys_linux_2.1.7.tgz, updated the PSYS library's headers to be compatible with
	current GNU compilers that don't provide the deprecated "linux" macro any more but
	still provide the "__linux__" macro from the reserved C namespace.

2018-08-06:MJ: psys_linux_2.1.8.tgz, updated the PSYS driver (now version 0.6.9)
	to be compatible with kernels 4.15 and following. No functional change between
	library version 2.1.7 -> 2.1.8.

2019-03-11:MJ: psys_linux_2.1.9.tgz, updated the PSYS driver (now versino 0.6.11)
	to be compatible with kernels 5.0 and following. No functional change between
	library version 2.1.8 -> 2.1.9.

2021-05-01:MJ/JU: psys_linux_2.2.1.tgz, fixed the possibility to transfer non
	zero-terminated strings to the kernel driver. Added support for kernel >= 5.6*
	which needs driver version 0.6.12 that fixes a problem with the changed Linux
	API of the proc_create() function.

2021-11-10:MJ: psys_linux_2.2.2.tgz, Cleaned up the PSYS library's headers to only include
	 the headers needed to make the psys.h API declarations compilable. This avoids as
	much as possible any namespace pollution induced by including psys.h into an 
	application program.
	No functional change in library or driver (still version 0.6.12).

2021-12-12:MJ: psys_linux_2.2.3.tgz, Change the way to name threads. Use pthread_setname_np()
	to set a thread name that can also be seen with 'ps'. The old style by creating
	files under /var/run/psys/ is still enabled. More details in the README.
	No functional change in driver.

2022-08-30:MJ: psys_linux_2.2.4.tgz, Fix bug with psysTimerSet() where timers with
        zero interval (single shot timers) would not run its callback function.
	No functional change in driver. But driver version was increased to mark
	changes in driver build infrastructure.