Permanent MAC address for aggregated Ethernet interface

The number of static MAC addresses for:

• VMX, MX240, MX480, and MX960 from 16 to 80.
• MX2008, MX2010, and MX2020 from 0 to 80.

  The chassid process (chassisd) now allocates MAC addresses to aggregated Ethernet interfaces in this pattern:

• First 16 interfaces receive addresses from a private MAC pool.
• Next 64 ae interfaces receive addresses from a reserved public MAC pool.
• Rest of the ae interfaces receive addresses from a public MAC pool.