web commit by XTaran: Bug report: htmltidy has no possibilty to use an alternative config file which may other usages

doc/bugs/htmltidy_has_no_possibilty_to_use_an_alternative_config_file_which_may_break_other_usages.mdwn

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+The htmltidy plugin as in the Backports.org version 2.32.3~bpo40+1 of ikiwiki does not play well with other usages of HTML Tidy since it has no possibility to use an alternative config file.
+
+E.g. since I usually use HTML Tidy manually only to check and not to fix HTML, I have "write-back: no" in my $HOME/.tidyrc which throws an awful lot of Perl warnings and renders all ikiwiki pages empty as soon as I enable htmltidy.
+
+I see two possibilities how to fix this:
+
+1) Replace "$pid=open2(*IN, *OUT, 'tidy -quiet -asxhtml -utf8 --show-body-only yes -
+-show-warnings no --tidy-mark no');" by "$pid=open2(*IN, *OUT, 'tidy -quiet -asxhtml -utf8 --show-body-only yes -
+-show-warnings no --tidy-mark no --write-back yes');" -- This is the fastest fix, but not very elegant, since it doesn't solve the general problem.
+
+2) Make it configurable via ikiwiki.setup as e.g.with the tags plugin. Haven't looked into this code yet.