[Wien] lapw2c tries to read an anomalous amount of data

[Luc Fruchter]

I changed to Wien2k 19.1 version, latest Intel ifort compiler (2019.4) 
and latest Ubuntu (18.04.2), shared memory, 4 CPUs, same case with 154 
atoms :

- no more anomalous reading of the disk from parallel lapw2c

- the system is however slowed down a lot (as seen from switching 
between applications), although there is very little use of the CPUs. 
The usage of the Cpus looks strange, compared to lpaw1c : quasi idle 
state, interrupted by burst of synchronous CPU use for a few seconds 
(why are lpaw2c synchronous: exchange data ?).

- no log warnings