libsodium 0.6.0
libsodium: add 0.6.0 bottle.

Closes #30629.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
Keep riak straight in cellar sandbox. Update configuration to store logs and data under /usr/local/var subfolders.
Revert moving riak to cellar sandbox. Back to keeping installation files in libexec, but having data and logs under /usr/local/var
Add fix development build of riak, which use different config file format
Fix code style issues
libsodium: update 0.6.0 bottle.
riak: add 1.4.9 bottle.