7 - Fix --ignore-flag with -fPIE.
8 - Detect overwrite of -D_FORTIFY_SOURCE=2 with -D_FORTIFY_SOURCE=0 or 1 or
11 - Add --ignore-arch-flag and --ignore-arch-line options to ignore flags and
12 lines on certain architectures only.
13 - Buildd tags "no-compiler-commands" and "invalid-cmake-used" are now
14 information ('I-') instead of warning ('W-').
15 - Ignore false positives when using moc-qt4.
21 - Fix --version, --help.
23 - Remove -Wformat-security from expected CFLAGS because it's already implied
24 by -Werror=format-security (removed in dpkg-dev >= 1.16.3).