Bug#898916: dh-autoreconf: Unconditionally invokes gtkdocize without dependency

[Andreas Metzler]

Package: dh-autoreconf
Version: 18
Severity: serious

Hello,

Version 18 invokes gtkdocize without a way to disable this, although
it does not depend on gtk-doc-tools.

This breaks e.g. building libtasn1-6 which has gtk-doc-tools only in
Build-Depends-Indep because it uses --disable-gtk-doc on binary-only
builds.

Please either add a dependency or(and) add a way to disable running
gtkdocize.

Thanks, cu Andreas
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