Log Message:
Update to 3.26:
Avoid core dump in some cases where the callback croaks.
The perl_call_method and perl_call_sv needs G_EVAL flag
to be safe.

New parser attributes; 'attr_encoded' and 'case_sensitive'.
Contributed by Guy Albertelli II <guy@albertelli.com>.

HTML::Entities
    - don't encode \r by default as suggested by Sean M. Burke.

HTML::HeadParser
    - ignore empty http-equiv
    - allow multiple <link> elements.  Patch by
      Timur I. Bakeyev <timur@gnu.org>

Avoid warnings from bleadperl on the uentities test.