remove Clink (unmaintained since 2021, certificate expired) (#3837)

- https://git.swurl.xyz/swirl/clink : HTTPSConnectionPool(host='git.swurl.xyz', port=443): Max retries exceeded with url: /swirl/clink (Caused by SSLError(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: certificate has expired (_ssl.c:997)')))
- ref. https://github.com/awesome-selfhosted/awesome-selfhosted/issues/3558

README.md

@@ -768,7 +768,7 @@ A [document management system](https://en.wikipedia.org/wiki/Document_management
 - [I, Librarian](https://i-librarian.net) - I, Librarian can organize PDF papers and office documents. It provides a lot of extra features for students and research groups both in industry and academia. ([Demo](https://i-librarian.net/demo/), [Source Code](https://github.com/mkucej/i-librarian-free)) `GPL-3.0` `PHP`
 - [Mayan EDMS](https://www.mayan-edms.com) - Free Open Source Electronic Document Management System. An electronic vault for your documents with preview generation, OCR, and automatic categorization among other features. ([Source Code](https://gitlab.com/mayan-edms/mayan-edms)) `Apache-2.0` `Python`
 - [Paperless-ngx](https://docs.paperless-ngx.com/) - A fork of paperless, adding a new interface and many other changes under the hood. Scan, index, and archive all of your paper documents. ([Demo](https://demo.paperless-ngx.com/), [Source Code](https://github.com/paperless-ngx/paperless-ngx)) `GPL-3.0` `Python`
-- [Papermerge](https://www.papermerge.com) - Open Source Document Management System focused on scanned documents (electronic archives). Features file browsing in similar way to dropbox/google drive. OCR, full text search, text overlay/selection. ([Source Code](https://github.com/ciur/papermerge)) `Apache-2.0` `Python`
+- [Papermerge](https://papermerge.com) - Open Source Document Management System focused on scanned documents (electronic archives). Features file browsing in similar way to dropbox/google drive. OCR, full text search, text overlay/selection. ([Source Code](https://github.com/ciur/papermerge)) `Apache-2.0` `Python`
 - [paper{s}pace](https://dedicatedcode.com/projects.html) - Small web application to manage all your offline documents. Provides a searchable storage for your documents and reminds you of upcoming tasks. ([Source Code](https://gitlab.com/dedicatedcode/paperspace)) `MIT` `Java`
 - [Stirling-PDF](https://github.com/Frooodle/Stirling-PDF) - Local hosted web application that allows you to perform various operations on PDF files, such as merging, splitting, file conversions and OCR. `Apache-2.0` `Docker/Java`
 - [Teedy](https://teedy.io/) - Lightweight document management system packed with all the features you can expect from big expensive solutions (Ex SismicsDocs). ([Demo](https://demo.teedy.io/), [Source Code](https://github.com/sismics/docs)) `GPL-2.0` `Docker/Java`
@@ -2030,7 +2030,6 @@ _Related: [Task Management & To-do Lists](#task-management--to-do-lists), [Softw
 Before hosting one, please see [shortcomings](https://en.wikipedia.org/wiki/URL_shortening#Shortcomings) of URL shorteners.
 
 - [Blink](https://docs.blink.rest) - Easy-to-host, SSO-integrated, CDN-powered link shortener (+decoupled analytics) for teams. ([Source Code](https://github.com/JaneJeon/blink)) `AGPL-3.0` `Nodejs`
-- [Clink](https://short.swurl.xyz/) - Dead-simple, super minimal URL shortener in C. ([Source Code](https://git.swurl.xyz/swirl/clink)) `AGPL-3.0` `C`
 - [Easyshortener](https://github.com/easypanel-community/easyshortener) - A simple URL shortener. `MIT` `PHP/Nodejs/Docker`
 - [goshorly](https://gitea.hackmi.ch/Phil/goshorly) - An easy self-hosted Link shortener in Golang. `MIT` `Go`
 - [Kutt](https://kutt.it) - A modern URL shortener with support for custom domains. ([Source Code](https://github.com/thedevs-network/kutt)) `MIT` `Nodejs`