Stemcell 3421.4

• Bump CentOS stemcells for CESA-2017:1382 - sudo vulnerability

Stemcell 3421.3

• Bump Ubuntu stemcells for USN-3304-1: Sudo vulnerability

Stemcell 3421

New:

• Added env.bosh.remove_static_libraries (bool) to remove static libraries
  • Useful to enable this option when exporting compiled releases
• Added env.bosh.ipv6.enable (bool) to remove ipv6.disable kernel functionality at bootup time

Fixes:

• Fixed sysstat logging
• Fixed anacron's RANDOM_DELAY configuration

Bumps:

• Bumped s3cli v0.0.60
  • Updated aws-sdk-go to solve network timeout edge case
• Bumped davcli v0.0.19
  • Use TCP keep alive to solve network timeout edge case
• Bumped bosh-agent v0.0.35
  • Add -v to the Agent binary
  • Prepared sync_dns action to work with future Director's DNS integration