Update IRC references to Libera.Chat

Author: CyberShadow

README.md

@@ -10,7 +10,7 @@ DFeed is:
 - an IRC bot
 
 DFeed is running on [forum.dlang.org](https://forum.dlang.org/)
-and the [#d channel on FreeNode](irc://chat.freenode.net/d).
+and the [#d channel on Libera.Chat](irc://irc.libera.chat/d).
 
 Quick start guide:
 

config/sinks/irc/irc.ini.sample

@@ -1,7 +1,7 @@
 # IRC sink parameters.
 
 # IRC server to connect to.
-#server = irc.freenode.net
+#server = irc.libera.chat
 
 # Port. Defaults to 6667.
 #port = 6667

src/dfeed/web/captcha/dcaptcha.d

@@ -51,9 +51,9 @@ final class Dcaptcha : Captcha
 			`<input type="hidden" "dcaptcha_response_field"></input>` ~
 			`<input name="dcaptcha_response_field"></input>` ~
 			`<p><b>` ~ _!`Hint` ~ `</b>: ` ~ challenge.hint ~ `</p>` ~
-			`<p>` ~ _!"Is the CAPTCHA too hard?\nRefresh the page to get a different question,\nor ask in the %s#d IRC channel on Freenode%s."
+			`<p>` ~ _!"Is the CAPTCHA too hard?\nRefresh the page to get a different question,\nor ask in the %s#d IRC channel on Libera.Chat%s."
 				.replace("\n", `<br>`)
-				.format(`<a href="http://webchat.freenode.net?randomnick=1&channels=%23d">`, `</a>`) ~
+				.format(`<a href="https://web.libera.chat/#d">`, `</a>`) ~
 			`</p>`
 		;
 	}