pkg/55890: devel/tclap has packaging problem

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>Number:         55890
>Category:       pkg
>Synopsis:       devel/tclap has packaging problem
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    pkg-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Dec 21 23:00:00 +0000 2020
>Originator:     Mustafa Dogan
>Release:        pkgsrc-HEAD 20201220
>Organization:
TESMER
>Environment:
NetBSD 9.1_STABLE amd64
>Description:
devel/tclap has packaging problem. 
After compiling, because of $WRKSRC}/doc/html folder permissions, make package fails with message something looks like:
warning: "share/doc/tclap/html: group-writable directory"
error: "share/doc/tclap/html: world-writable directory"
 
>How-To-Repeat:

>Fix:
Add to Makefile
post-extract:
    ${CHMOD} -R go-w ${WRKSRC}/docs