Merge pull request #5670 from RosettaCommons/roccomoretti/interactive_fix_linux_restart
[Foldit] Fix Linux crash on update.
Fix the issue where the Linux client crashes on update. It looks like we were using the execv() function slightly wrong. Apparently, you're supposed to also give the program name in the argument list, in addition to the first parameter.
I've also included a few variable initializations which were pointed out by Valgrind.
Release Notes: Fix crashes of the Linux client when updating.