v2.6.0

docker multi-stage build (self-contained build)
go modules
updated gobgp to 2.2.0
added flag for bgp community
working maglev hashing
working mtu 9000
fix for runaway processes not being terminated and causing file handlers to fill up
updated many dependencies to current versions
added gobgpd Dockerfile
new makefile with simpler build commands
fixed sysctl setting application (with revamped code)
lots more logging
new repository structure with cmd/ directory
moved to go 1.15
working dummy interfaces
greatly improved performance on clusters with a large number of services and endpoints