the product release finder does not strip the flavor info after the ~

The releases version are incorrect because the ~ that marked the start of the flavor information was converted to a -.

    in: php-fpm-0.6~5.3.1.tar.gz
    out: 0.6

flavor_pattern = re.compile(r"""
    (~ # packaging
     |_[a-z][a-z]_[A-Z][A-Z] # Language version
     |_(%s) # or processor version
     |[\.-](win32|OSX) # or OS version
     |\.(deb|noarch|rpm|dmg|exe) # or packaging version
    ).* # to the end of the string
    """ % processors, re.VERBOSE)