pkg/56104: oath-toolkit: provide -doc option

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>Number:         56104
>Category:       pkg
>Synopsis:       oath-toolkit: provide -doc option
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    pkg-manager
>State:          open
>Class:          change-request
>Submitter-Id:   net
>Arrival-Date:   Tue Apr 13 05:00:00 +0000 2021
>Originator:     Paul W. Rankin
>Release:        trunk a262346a
>Organization:
>Environment:
Darwin nostromo.local 17.7.0 Darwin Kernel Version 17.7.0: Fri Oct 30 13:34:27 PDT 2020; root:xnu-4570.71.82.8~1/RELEASE_X86_64 x86_64

>Description:
Building oath-toolkit requires gtk-doc by default, which pulls in a load of extra dependencies. However, gtk-doc is only required to build the API documentation, and oath-toolkit can be built without it.

I'd like to request that oath-toolkit use the options framework with an added -doc option (which may remain enabled by default) to build oath-toolkit without requiring gtk-doc.
>How-To-Repeat:
cd security/oath-toolkit; bmake clean install
>Fix:
Add to Makefile:
# TOOL_DEPENDS+=	gtk-doc-[0-9]*:../../textproc/gtk-doc
DISTCHECK_CONFIGURE_FLAGS=