pasta's TCP proxy sends RST packets with wrong sequence numbers after
the first data packet, breaking TCP connections from Docker containers
to external hosts. slirp4netns doesn't have this bug.
Changes:
- Default gitea_runner_docker_rootless_net_driver changed to slirp4netns
- Port driver: 'implicit' for pasta, 'builtin' for slirp4netns
- daemon.json: DNS configured per driver (10.0.2.3 for pasta, 8.8.8.8 for slirp4netns)
- IPv6 only enabled for pasta (slirp4netns doesn't support IPv6)
- integration_test: retry service active check (handles slow startup)
Emil Simeonov
7cf6ce9afb