a sorted list of available network interfaces thats not a part of
any bridge or bond

isin - is element in list
rmel - remove element from list
ask - Ask a question and read response
ask_until - repeat a question til a non-blank response
ask_which - repeat a question til a listed option is entered

We want avoid asking questions and in the proxy case most people will
pick 'none'.

For those who needs proxy there is still a possibility to specify the
entire proxy url in one shot, rather than asking lot of questions.

Thanks to Jim Pryor for the very useful feedback.

Not needed.

Thanks to Jim Pryor for pointing this out.

we need anchor on both sides.

Thanks to Jim Pryor for pointing this out.

Make it a bit more clear what is going on by moving initialization
of mnt_boot to same place for both cases.

And remove redundant code line.

Thanks to Jim Pryor for pointing this out.

fix case when mountpoint is a prefix of other mount. For example:

 setup-disk /d

which would also match /dev and create various bogus entries in the
generated fstab.

Thanks to Jim Pryor for pointing this out.

Thanks to Jim Pryor for pointing this out.

fixes #715

Roger Pau Monné authored Dec 30, 2011 and Natanael Copa committed Dec 30, 2011

Modified setup-interfaces to create simple bridges (works only with
one interface per bridge). Useful when setting up a Xen system, since
interfaces need to be bridged in order for guests to have networking.
Some distributions automatically create one bridge for each interface
when Xen is installed, but I think this is too aggressive.

Changes since v1:

 * Only ask to bridge interfaces if Xen Dom0 is detected

less questions

When we replace alpine_dev we should not remove the :<filesystem>

- encapsulate the alternatives in ''
- strip whitespacee from alternatives and separate with ,
- fix prompt

we encapsulate 'none' within '' everywhere else

ref #786