Configurable TLS cipher suites and versions; disallow weak ciphers

Add job init '-short' command docs to website

Added deferred cancel to prevent context leaks

UI: Server-side reschedule tracking

Update serf to pick up graceful leave fix

Override 3 sec. WMI timeout in gopsutil

Add link to privacy policy in website footer

Add driver health information to node list stub

disallow 3DES and RC4 ciphers

add documentation for tls_cipher_suites

Added link to updated privacy policy in footer of `layout.erb` for the OSS website.

Fix the CPU Information error message

The default timeout is too short for some overburdened or resource
constrained machines to complete the WMI query before the context
deadline expires.  This causes them to be unable to fingerprint the CPU
properly.

The new version of gopsutil introduces a 3 second timeout that could come up as an error here; however, we are outputting the wrong variable and eating the error.

Cloud Auto Join

client/driver/env: interpolate empty optional meta params as empty strings