Fix naming of IEEE 802 working groups

Use 'wpa' to refer to the 802.11i and 802.1x client side software
(wpa_supplicant) in general.
Don't rebuild the manpages on install

Only (forcefully) rebuild them when generating a source tarball.
This is an addendum to 9b500.
Allow group-accessible tuntap devices

The tuntap connection type requires both a User and a Group to be
defined. However, when configuring a tuntap device in the kernel, the
device's uid and gid must both match for someone to be able to use the
device. The only way to create a tuntap device accessible to a group of
users is therefore to avoid specifying the user argument to
"ip tuntap add".

Reported by: A Web
Updated man page to include pppoe and mobile_ppp

Removed unnecessary options from example connection.
add command to turn modem on, fix pin command
Small review of PPP related connections

The most important change is that we now bring the interface down
correctly in pppoe_down.
Management related changes

- add back to 'base' group
- add .gitignore that ignores build results