If: Extend CMP0054 to boolean evaluation
Merge topic 'if-sanity' into next

080819bb If: Extend CMP0054 to boolean evaluation
If: Introduce policy CMP0054 - don't dereference quoted variables in if()
Merge topic 'if-sanity' into next

c85ac500 If: Introduce policy CMP0054 - don't dereference quoted variables in if()