Update irnetbox.py for "double signals" configs
Update irnetbox.py for "double signals" configs

Add the ability to parse RedRat irnetbox config files with "double
signals".

stb-tester/stb-tester,LewisHaley/stb-tester,stb-tester/stb-tester,LewisHaley/stb-tester,stb-tester/stb-tester,LewisHaley/stb-tester,LewisHaley/stb-tester,stb-tester/stb-tester,LewisHaley/stb-tester,LewisHaley/stb-tester,LewisHaley/stb-tester