CI matrix

Platform	EPICS Base Version	authnstd	authnkrb	authnldap	pvxcert	pvacms	Tests
Linux (gcc)	7.0-secure-pvaccess	✅	✅	✅	✅	✅	✅
Linux (gcc)	R7.0.2	✅	✅	✅	✅	✅	✅
Linux (gcc)	3.15	✅	✅	✅	✅	✅	✅
Linux (clang)	7.0-secure-pvaccess	✅	✅	✅	✅	✅	✅
macOS	7.0-secure-pvaccess	✅	✅	✅	✅	✅	✅
Windows	7.0-secure-pvaccess	✅	❌	❌	✅	❌	❌