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too busy error.

The test scripts will retry when it sees this error.

wrapper, which means the server is WAY too busy. Instead of just
bailing, retry every 5 seconds. User is free to hit ^C to halt the
loop, no harm done.

Conflicts:
	tbsetup/tbswap.in

use EmulabFeatures;

if (EmulabFeatures->FeatureEnabled("NewMapper", $user, $group, $experiment)) {
   # Do something
}
else {
   # Do something else.
}

where $user, $group, and $experiment is the current Emulab user, group, and
experiment the script is operating as. Any of them can be undef. Note that
features can easily be globally enabled or disabled (bypassing user/group
check). See below.

There are two scripts to deal with features. The easy one is the script to
grant (or revoke) feature usage to a particular user or group or experiment:

boss> wap grantfeature -u stoller NewMapper
boss> wap grantfeature -p geni NewMapper
boss> wap grantfeature -e geni,myexp NewMapper

Add -r to revoke the feature.

The other script is for managing features. To create a new feature:

boss> wap emulabfeature create NewFeature 'A pithy description'

which adds the feature to the emulab_features DB table. Use "delete"
to remove a feature from the DB.

You can globally enable and disable features for all users/groups (the
user/group checks are bypassed). Global disable overrides global
enable. There are actually two different flags. Lots of rope, I mean
flexibility.

boss> wap emulabfeature enable NewFeature 1
boss> wap emulabfeature enable NewFeature 0

boss> wap emulabfeature disable NewFeature 1
boss> wap emulabfeature disable NewFeature 0

To display a list of all features and associated settings:

boss> wap emulabfeature list

To show the details (including the users and groups) of a specific
feature:

boss> wap emulabfeature show NewFeature

Oh, if a test is made in the code for a feature, and that feature is
not in the emulab_features table (as might be the case on other
Emulab's), the feature is "disabled".

swap.

when no nodes can be allocated, but there are nodes available and the
experiment would map.

resource locking issue that iptables should deal with, not me!

address; Try harder to recover instead of bailing.

This is a brute-force hack.  We fail on ANY overlap even though some overlaps
(e.g., with unused partitions) could be handled.  But handling those is a lot
of work for little gain.

Also: removed one last reference to SHD.

TODO: Come back soon and fix the underlying problem which is the use of 'foo || bar' to get attribute values in perl.

Another idea whose time never came...

Fix from Mike Ryan.  We got away without this because the GNUmakefile will
run configure on those files when we did a make.

yesterday's commit. Sorry Mike, for being so dense.

If LVM is not being used, then the code will attempt to make the extra FS
and use that for /vz.  However, in the NOSHAREDFS world, that filesystem
has already been made and is mounted on /local.  So check for that case and
just create a subdir/symlink: /vz -> /local/vz.

If NOSHAREDFS is defined, don't export /share to nodes in exports.head.

logging to the power command (to power.log).