cleanup: URL updates

- replace broken URL with the one it was most probably pointing to
  when added (lib/tftp.c)
- replace broken URL with archive.org link (lib/curl_ntlm_wb.c)
- delete unnecessary protocol designator from archive.org URL
  (docs/BINDINGS.md)

Closes #7562

docs/BINDINGS.md

@@ -59,7 +59,7 @@ Go: [go-curl](https://github.com/andelf/go-curl) by ShuYu Wang
 
 [Lisp](https://common-lisp.net/project/cl-curl/) Written by Liam Healy
 
-Lua: [luacurl](https://web.archive.org/web/20201205052437/http://luacurl.luaforge.net/) by Alexander Marinov, [Lua-cURL](https://github.com/Lua-cURL) by Jürgen Hötzel
+Lua: [luacurl](https://web.archive.org/web/20201205052437/luacurl.luaforge.net/) by Alexander Marinov, [Lua-cURL](https://github.com/Lua-cURL) by Jürgen Hötzel
 
 [Mono](https://forge.novell.com/modules/xfmod/project/?libcurl-mono) Written by Jeffrey Phillips
 

lib/curl_ntlm_wb.c

@@ -426,7 +426,8 @@ CURLcode Curl_output_ntlm_wb(struct Curl_easy *data, struct connectdata *conn,
     /* Use Samba's 'winbind' daemon to support NTLM authentication,
      * by delegating the NTLM challenge/response protocol to a helper
      * in ntlm_auth.
-     * http://devel.squid-cache.org/ntlm/squid_helper_protocol.html
+     * https://web.archive.org/web/20190925164737
+     * /devel.squid-cache.org/ntlm/squid_helper_protocol.html
      * https://www.samba.org/samba/docs/man/manpages-3/winbindd.8.html
      * https://www.samba.org/samba/docs/man/manpages-3/ntlm_auth.1.html
      * Preprocessor symbol 'NTLM_WB_ENABLED' is defined when this

lib/tftp.c

@@ -720,7 +720,7 @@ static CURLcode tftp_tx(struct tftp_state_data *state, tftp_event_t event)
          /* There's a bug in tftpd-hpa that causes it to send us an ack for
           * 65535 when the block number wraps to 0. So when we're expecting
           * 0, also accept 65535. See
-          * http://syslinux.zytor.com/archives/2010-September/015253.html
+          * https://www.syslinux.org/archives/2010-September/015612.html
           * */
          !(state->block == 0 && rblock == 65535)) {
         /* This isn't the expected block.  Log it and up the retry counter */