Initial QSfera import

Server/vendor/github.com/docker/go-connections/sockets/proxy.go

@@ -0,0 +1,31 @@
+package sockets
+
+import (
+	"net"
+	"os"
+	"strings"
+)
+
+// GetProxyEnv allows access to the uppercase and the lowercase forms of
+// proxy-related variables.  See the Go specification for details on these
+// variables. https://golang.org/pkg/net/http/
+//
+// Deprecated: this function was used as helper for [DialerFromEnvironment] and is no longer used. It will be removed in the next release.
+func GetProxyEnv(key string) string {
+	proxyValue := os.Getenv(strings.ToUpper(key))
+	if proxyValue == "" {
+		return os.Getenv(strings.ToLower(key))
+	}
+	return proxyValue
+}
+
+// DialerFromEnvironment was previously used to configure a net.Dialer to route
+// connections through a SOCKS proxy.
+//
+// Deprecated: SOCKS proxies are now supported by configuring only
+// http.Transport.Proxy, and no longer require changing http.Transport.Dial.
+// Therefore, only [sockets.ConfigureTransport] needs to be called, and any
+// [sockets.DialerFromEnvironment] calls can be dropped.
+func DialerFromEnvironment(direct *net.Dialer) (*net.Dialer, error) {
+	return direct, nil
+}