More ipallocator refactoring

Now x1.5 faster

Signed-off-by: Alexandr Morozov <lk4d4math@gmail.com>
Implement allocating IPs from CIDR within bridge network

Fixes #4986

Signed-off-by: Alexandr Morozov <lk4d4math@gmail.com>
Adding additional documentation for fixed-cidr networking

Docker-DCO-1.1-Signed-off-by: Frederick F. Kautz IV <fkautz@alumni.cmu.edu> (github: fkautz)

Signed-off-by: Alexandr Morozov <lk4d4@docker.com>
Automatically clean up hello-world container with --rm

Signed-off-by: Bruno Binet <bruno.binet@gmail.com>
Change unused WriteCloser to Writer

Signed-off-by: Alexandr Morozov <lk4d4@docker.com>
Close logs pipes and catch write errors

Signed-off-by: Alexandr Morozov <lk4d4@docker.com>
Merge pull request #6101 from LK4D4/ip_range_#4986

Implement allocating IPs from CIDR within bridge network
Merge pull request #8121 from bbinet/cleanup-hello-world-container

Automatically clean up hello-world container with --rm
integcli: fix race in runCommandWithStdoutStderr

Docker-DCO-1.1-Signed-off-by: Cristian Staretu <cristian.staretu@gmail.com> (github: unclejack)
Merge pull request #8164 from unclejack/fix_utils_race

integcli: fix race in runCommandWithStdoutStderr
Merge pull request #8159 from LK4D4/fix_goroutine_leak_in_logs

Fix goroutine leak in logs following