caddytls,caddyhttp: Placeholders for some TLS and HTTP matchers (#6480)

* Runtime placeholders for caddytls matchers (1/3):

- remove IPs validation in UnmarshalCaddyfile

* Runtime placeholders for caddytls matchers (2/3):

- add placeholder replacement for IPs in Provision

* Runtime placeholders for caddytls matchers (3/3):

- add placeholder replacement for other strings

* Runtime placeholders for caddyhttp matchers (1/1):

- add placeholder replacement for IPs in Provision

* Runtime placeholders for caddyhttp/caddytls matchers:

- move PrivateRandesCIDR under internal

1 files changed, 14 insertions, 0 deletions

diff --git a/internal/ranges.go b/internal/ranges.go
new file mode 100644
index 000000000..e9429e263
--- /dev/null
+++ b/internal/ranges.go
@@ -0,0 +1,14 @@
+package internal
+
+// PrivateRangesCIDR returns a list of private CIDR range
+// strings, which can be used as a configuration shortcut.
+func PrivateRangesCIDR() []string {
+	return []string{
+		"192.168.0.0/16",
+		"172.16.0.0/12",
+		"10.0.0.0/8",
+		"127.0.0.1/8",
+		"fd00::/8",
+		"::1",
+	}
+}