New comment by unspecd on void-packages repository

https://github.com/void-linux/void-packages/pull/29322#issuecomment-797246254

Comment:
> Do any of them dlopen the modules shipped by ppp?

It turned out that these packages themselves provide plugins for `ppp`:
```console
$ xlocate /usr/lib/pppd/
NetworkManager-1.22.10_2	/usr/lib/pppd/2.4.7/nm-pppd-plugin.so
NetworkManager-l2tp-1.8.6_2	/usr/lib/pppd/2.4.7/nm-l2tp-pppd-plugin.so
NetworkManager-pptp-1.2.8_5	/usr/lib/pppd/2.4.7/nm-pptp-pppd-plugin.a
NetworkManager-pptp-1.2.8_5	/usr/lib/pppd/2.4.7/nm-pptp-pppd-plugin.so
ppp-2.4.7_14	/usr/lib/pppd/2.4.7/minconn.so
…
```
```console
$ ( cd $(xdistdir) && find srcpkgs -name template -exec grep -B2 'usr/lib/pppd' {} + )
srcpkgs/NetworkManager-l2tp/template-	PPP_VERSION=$(awk '/VERSION/{print $3}' ${XBPS_CROSS_BASE}/usr/include/pppd/patchlevel.h)
srcpkgs/NetworkManager-l2tp/template:	./configure ${configure_args} --with-pppd-plugin-dir=/usr/lib/pppd/${PPP_VERSION}
--
srcpkgs/NetworkManager-pptp/template-	PPP_VERSION=$(sed -n '/VERSION/s/.*"\(.*\)".*/\1/p' ${XBPS_CROSS_BASE}/usr/include/pppd/patchlevel.h)
srcpkgs/NetworkManager-pptp/template:	./configure ${configure_args} --with-pppd-plugin-dir=/usr/lib/pppd/${PPP_VERSION}
--
srcpkgs/NetworkManager/template- -Dpppd=/usr/bin/pppd -Dqt=false
srcpkgs/NetworkManager/template- -Dsession_tracking_consolekit=false
srcpkgs/NetworkManager/template: -Dpppd_plugin_dir=/usr/lib/pppd/2.4.7 -Dresolvconf=/usr/bin/resolvconf
```
As we can see, `ModemManager` does not require `ppp`.