Significant rototill of lintpkgsrc.pl, converting to a rather twisted
hierarchy of PkgVer Pkgs and PkgList objects with assorted arbitrary
methods, all based on existing usage rather than ideal design.
Actual fixes found along the way:
- Handle := in makefiles
- Better handle parenthesis and "" in make conditionals
- parse bsd.pkg.mk to extract _REQD values (hence the previous line)
- Add missing 'key' in hash iteration
- Do not repeat includes (evolution longer depends on jpeg 45 times)
Still have to handle such delightful constructs as
DEPENDS += {qt2-designer>=2.2.4,qt2-designer-kde>=2.3.1nb1} in a sane way
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