Clarify that CONFLICTS are recognized automatically by the tools and
only very few cases need to be managed manually.
regen
Improve qt5 build structure, from Niclas Rosenvik:
Allow multiple BUILD_DIRS (but Makefile.common must be included later)
Adds installation of some cmake files and gets rid of many manual
installation rules.
Bump PKGREVISION where PLIST changed.
+hwloc-1.8.4, openmpi-1.8.4, sge-8.1.8, slurm-14.11.2
hwloc 1.8.4 -> 1.10.0
Add patches fixing four vulnerabilities.
Bump PKGREVISION.

Nudged by tez, thanks!
Updated archivers/unzip to 6.0nb2
Use CXX as C++ compiler. Remove messed up compile test using
non-existing file.