tpws: fc00::/7 private range. PF convert ipv4 to ipv6 mapped address

docs/bsd.eng.md

@@ -351,7 +351,7 @@ Put the string `net.inet6.send.opmode=0` to `/etc/sysctl.conf`.  If not present
 
 Then reboot the system.
 
-If you dont like this solution you can assign an additional static ipv6 address from `fd00::/8` range with `/128` prefix
+If you dont like this solution you can assign an additional static ipv6 address from `fc00::/7` range with `/128` prefix
 to your LAN interface and use it as the gateway address.
 
 tpws transparent mode only for outgoing connections.

docs/readme.eng.md

@@ -477,9 +477,9 @@ Other parameters `--bind-*` are related to the last bind.
 link local ipv6 (`fe80::/8`) mode selection :
 
 ```
---bind-iface6 --bind-linklocal=no : first selects private address fd00::/8, then global address
+--bind-iface6 --bind-linklocal=no : first selects private address fc00::/7, then global address
---bind-iface6 --bind-linklocal=unwanted : first selects private address fd00::/8, then global address, then LL
+--bind-iface6 --bind-linklocal=unwanted : first selects private address fc00::/7, then global address, then LL
---bind-iface6 --bind-linklocal=prefer : first selects LL, then private address fd00::/8, then global address
+--bind-iface6 --bind-linklocal=prefer : first selects LL, then private address fc00::/7, then global address
 --bind-iface6 --bind-linklocal=force : select only LL
 ```