b974faf update to latest HEAD

Authored and Committed by Zdenek Pavlas 10 years ago
    update to latest HEAD
    
    - Don't spawn more workers that #pkgfiles.
    - abort if $PWD does not exist. BZ 1001629
    - mergerepo: merge package versions from multiple repos. BZ 1020756
    - mergerepo: --repo option should work with relative paths.
    
        
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