bc7562 Use changes made by ISC

Authored and Committed by pemensik a year ago
    Use changes made by ISC
    
    Bind stopped using custom types. Adjusted to standard C99 types
    instead of using compat includes. Upstream is no longer alive anyway.
    
    Current source is lost and unmaintained.
    ISC has recent changes that can be used.
    
    Changed upstream URL
    
        
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