Closes pull request #2. Fixes a few typos, as well.

README.md

@@ -370,6 +370,7 @@ _Mailing lists servers and mass mailing software - one message to many recipient
 _[IRC](https://en.wikipedia.org/wiki/Internet_Relay_Chat) communication software_
 
 - [Convos](http://convos.by/) - Always online web IRC client. ([Demo](http://demo.convos.by), [Source Code](http://github.com/nordaaker/convos)) `Artistic-2.0` `Perl`
+- [InspIRCd](https://www.inspircd.org/) - Modular IRC server written in C++ for Linux, BSD, Windows, and macOS. ([Source Code](https://github.com/inspircd)) `GFDL-1.2-only` `C++`
 - [Dispatch](https://github.com/khlieng/dispatch) - Self-hosted web IRC client written in Go. ([Demo](https://dispatch.khlieng.com/connect)) `MIT` `Go`
 - [Kiwi IRC](https://kiwiirc.com/) - Responsive web IRC client with theming support. ([Demo](https://kiwiirc.com/nextclient/)), ([Source Code](https://github.com/kiwiirc/kiwiirc)) `Apache-2.0` `Nodejs`
 - [The Lounge](https://thelounge.github.io/) - Self-hosted web IRC client. ([Demo](https://demo.thelounge.chat/), [Source Code](https://github.com/thelounge/lounge)) `MIT` `Nodejs`
@@ -1435,6 +1436,12 @@ See also [Documentation Generators](#documentation-generators), [Wikimatrix](htt
 - `DPL` - [Devblocks Public License 1.0](https://cerb.ai/license/)
 - `ECL-2.0` - [Educational Community License, Version 2.0 ](http://opensource.org/licenses/ECL-2.0)
 - `EPL-1.0` - [Eclipse Public License, Version 1.0](https://www.eclipse.org/legal/epl-v10.html)
+- `GFDL-1.1-only` - [GNU Free Documentation License v1.1](https://spdx.org/licenses/GFDL-1.1-only.html)
+- `GFDL-1.1-or-later` - [GNU Free Documentation License v1.1](https://spdx.org/licenses/GFDL-1.1-or-later.html)
+- `GFDL-1.2-only` - [GNU Free Documentation License v1.2](https://spdx.org/licenses/GFDL-1.2-only.html)
+- `GFDL-1.2-or-later` - [GNU Free Documentation License v1.2](https://spdx.org/licenses/GFDL-1.2-or-later.html)
+- `GFDL-1.3-only` - [GNU Free Documentation License v1.2](https://spdx.org/licenses/GFDL-1.3-only.html)
+- `GFDL-1.3-or-later` - [GNU Free Documentation License v1.2](https://spdx.org/licenses/GFDL-1.3-or-later.html)
 - `GPL-1.0` - [GNU General Public License](https://www.gnu.org/licenses/gpl-1.0)
 - `GPL-2.0` - [GNU General Public License 2.0](https://www.gnu.org/licenses/old-licenses/gpl-2.0.en.html)
 - `GPL-3.0-only` - [GNU General Public License v3.0 only](https://spdx.org/licenses/GPL-3.0-only.html)