[Refactoring] cleanup code in Parameter::isLazyArray()
fix Issue 13508 - array vararg function safety not inferred
improve cast error message
Merge pull request #4006 from WalterBright/improve-msg

improve cast error message
Remove unused UTFTest.cpp
Merge pull request #4018 from ibuclaw/rmutftest

Remove unused UTFTest.cpp
Merge pull request #4015 from 9rnsr/fix13508

Issue 13508 - array vararg function safety not inferred
Warn on C-style array declarations
Merge pull request #4021 from WalterBright/no-c-array

Warn on C-style array declarations
Switch license to BOOST
Remove old gpl/artistic license files, add boostlicense.txt