/usr/share/doc/ is in pptpd 1.4.0-7.
This file is owned by root:root, with mode 0o755.
..
/usr/share/doc/pptpd/TODO.gz
/usr/share/doc/pptpd/
/usr/share/doc/pptpd/README.logwtmp
/usr/share/doc/pptpd/copyright
/usr/share/doc/pptpd/README.slirp
/usr/share/doc/pptpd/poptop_ads_howto/
/usr/share/doc/pptpd/poptop_ads_howto/poptop_ads_howto_8.htm
/usr/share/doc/pptpd/poptop_ads_howto/poptop_ads_howto_10.htm
/usr/share/doc/pptpd/poptop_ads_howto/poptop_ads_howto_3.htm
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/usr/share/doc/pptpd/poptop_ads_howto/poptop_ads_howto_9.htm
/usr/share/doc/pptpd/poptop_ads_howto/poptop_ads_howto_4.htm
/usr/share/doc/pptpd/poptop_ads_howto/poptop_ads_howto_5.htm
/usr/share/doc/pptpd/poptop_ads_howto/diagram1.jpg
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/usr/share/doc/pptpd/poptop_ads_howto/poptop_ads_howto_6a.htm
/usr/share/doc/pptpd/poptop_ads_howto/poptop_ads_howto_6.htm
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/usr/share/doc/pptpd/poptop_ads_howto/poptop_ads_howto_12.htm
/usr/share/doc/pptpd/poptop_ads_howto/poptop_ads_howto_7.htm
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/usr/share/doc/pptpd/poptop_ads_howto/poptop_ads_howto_a2.htm
/usr/share/doc/pptpd/README.Debian
/usr/share/doc/pptpd/AUTHORS
/usr/share/doc/pptpd/README
/usr/share/doc/pptpd/README.portslave
/usr/share/doc/pptpd/README.inetd
/usr/share/doc/pptpd/changelog.Debian.gz