Add ppa:chris-lea/libsodium to the whitelist

[bitbeans]

Fixes #122.
This pull request adds
https://launchpad.net/~chris-lea/+archive/ubuntu/libsodium to the
whitelist.

The PPA provides:

• libsodium 1.0.3

[bitbeans]

@BanzaiMan is there a chance to get this merged? :)

[berkus]

Please merge this!

[ranisalt]

Please do, I need this too.

[rugk]

Any news?

[ranisalt]

Now 1.0.3 is very old and 1.10+ would be interesting. Maybe prior to 2020 Travis guys answer something.

[rugk]

IMHO at last 1.0.0 should be used. v1.0.0 is even in the stable (Jessie) debian packages.

[yarcowang]

I failed installing it in travis... Will they plan to include it?

0.40s$ sudo apt-get install libsodium-dev
Reading package lists... Done
Building dependency tree       
Reading state information... Done
E: Unable to locate package libsodium-dev
The command "sudo apt-get install libsodium-dev" failed and exited with 100 during .
Your build has been stopped.

[wsargent]

I'm having problems here as well:

Using Scala 2.11.8
before_install.1
4.42s$ sudo apt-get -qq update
W: http://dl.hhvm.com/ubuntu/dists/trusty/InRelease: Signature by key 36AEF64D0207E7EEE352D4875A16E7281BE7A449 uses weak digest algorithm (SHA1)
W: http://ppa.launchpad.net/couchdb/stable/ubuntu/dists/trusty/Release.gpg: Signature by key 15866BAFD9BCC4F3C1E0DFC7D69548E1C17EAB57 uses weak digest algorithm (SHA1)
W: http://ppa.launchpad.net/builds/sphinxsearch-rel20/ubuntu/dists/trusty/Release.gpg: Signature by key 2FE7BA61B28B34B7A2B749A2B9D8946B16932B16 uses weak digest algorithm (SHA1)
W: http://ppa.launchpad.net/builds/sphinxsearch-rel21/ubuntu/dists/trusty/Release.gpg: Signature by key 2FE7BA61B28B34B7A2B749A2B9D8946B16932B16 uses weak digest algorithm (SHA1)
0.24s$ sudo apt-get install -y libsodium-dev
Reading package lists... Done
Building dependency tree       
Reading state information... Done
E: Unable to locate package libsodium-dev

[ranisalt]

Now this ppa is so outdated it doesn't make sense to add it.

[berkus]

@ranisalt Good strategy, wait long enough until ppa is obsolete and then you don't have to do anything!

Probably there's a newer version, but i hope it's just in jessie packages already.

[ph4r05]

I also need libsodium-dev, which is not available on non-sudo travis.

E: Unable to locate package libsodium-dev

@BanzaiMan would you please consider a merge? Thanks!

[iphydf]

This PR needs to be re-done. It's conflicting now.