- remove compatibility obsolete sitelib directories
    - use a better BuildRoot
    - drop a redundant mkdir in %%install
    - call patchlevel.h only once; rm patchlevel.bak
    - update modules Sys::Syslog, Module::Load::Conditional, Module::CoreList,
        Test::Harness, Test::Simple, CGI.pm (dropping the upstreamed patch),
        File::Path (that includes our perl-5.10.0-CVE-2008-2827.patch),
        constant, Pod::Simple, Archive::Tar, Archive::Extract, File::Fetch,
        File::Temp, IPC::Cmd, Time::HiRes, Module::Build, ExtUtils::CBuilder
    - standardize the patches for updating embedded modules
    - work around a bug in Module::Build tests bu setting TMPDIR to a directory
        inside the source tree