Vendor latest c/common and fix tests

This vendors the latest c/common version, including making Pasta
the default rootless network provider. That broke a number of
tests, which have been fixed as part of this PR.

Also includes a change to network stats logic, which simplifies
the code a bit and makes it actually work with Pasta.

Signed-off-by: Matt Heon <mheon@redhat.com>

vendor/github.com/containers/common/pkg/config/containers.conf

@@ -384,9 +384,9 @@ default_sysctls = [
 
 
 # Configure which rootless network program to use by default. Valid options are
-# `slirp4netns` (default) and `pasta`.
+# `slirp4netns` and `pasta` (default).
 #
-#default_rootless_network_cmd = "slirp4netns"
+#default_rootless_network_cmd = "pasta"
 
 # Path to the directory where network configuration files are located.
 # For the CNI backend the default is "/etc/cni/net.d" as root

vendor/github.com/containers/common/pkg/config/default.go

@@ -257,7 +257,7 @@ func defaultConfig() (*Config, error) {
 			DefaultNetwork:            "podman",
 			DefaultSubnet:             DefaultSubnet,
 			DefaultSubnetPools:        DefaultSubnetPools,
-			DefaultRootlessNetworkCmd: "slirp4netns",
+			DefaultRootlessNetworkCmd: "pasta",
 			DNSBindPort:               0,
 			CNIPluginDirs:             attributedstring.NewSlice(DefaultCNIPluginDirs),
 			NetavarkPluginDirs:        attributedstring.NewSlice(DefaultNetavarkPluginDirs),