376f6f4 Update to latest upstream release.

Authored and Committed by jjames 4 years ago
    Update to latest upstream release.
    
    Also:
    - Eliminate unnecessary BRs and Rs.
    - Eliminate rpath from the library.
    - Force libtool to not defeat -Wl,--as-needed.
    - Be explicit about library versions as required by latest guidelines.
    - Filter out unnecessary Libs values from pkgconfig files.
    - Add -doc subpackage; run doxygen.
    
        
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