Fix a potentially infinite loop in preobit_reply(). Even if the errno is EINTR repeatedly, don't retry DIS_reply_read indefinitely. TRQ-2001.
TRQ-1945. Nodes were left assigned to jobs whose slot limit didn't allow them to run.
Change the revision version to 4.2.3.h3
Merge branch '4.2.3.h4' into 4.2.3.h3

Conflicts:
	configure.ac
Finish merge of 4.2.3.h4 into 4.2.3.h3
Changed version to 4.2.3.h4