Links fixed

Author: Artiom N.

README.en.md

@@ -6,27 +6,27 @@ This repository contains the programming examples for the book "Network Programm
 
 - [Beginning](#beginning)
 - [FAQ](#faq)
-  - [Is here all code without bugs?](is-here-all-code-without-bugs)
+  - [Is here all code without bugs?](#is-here-all-code-without-bugs)
   - [Why am I banned?](#why-am-i-banned)
   - [Do I need update?](#do-i-need-update)
   - [How to build examples?](#how-to-build-examples)
   - [What to do if build failed?](#build-failed)
   - [Why do you use Linux?](#why-do-you-use-linux)
   - [Can I build the examples under Windows?](#can-i-build-the-examples-under-windows)
   - [What can I read about CMake?](#what-can-i-read-about-cMake)
-  - [Docker - what's it?](#docker---what-s-it)
+  - [Docker - what's it?](#docker---whats-it)
     - [How to use Docker?](#how-to-use-docker)
     - [Why can I run build only under root user?](#why-can-i-run-build-only-under-root-user)
     - [Can I build in the IDE?](#can-i-build-in-the-ide)
-    - [I can't connect to Docker or IDE doesn't see this?](#i-can-t-connect-to-docker-or-ide-doesn-t-see-this)
+    - [I can't connect to Docker or IDE doesn't see this?](#i-cant-connect-to-docker-or-ide-doesnt-see-this)
     - [Something absent in the build image](#something-absent-in-the-build-image)
-    - [Can I damage my system, when I works in the Docker environment?](can-i-damage-my-system--when-i-works-in-the-docker-environment)
+    - [Can I damage my system, when I works in the Docker environment?](#can-i-damage-my-system-when-i-works-in-the-docker-environment)
   - [How to run examples?](#how-to-run-examples)
   - [How to run console?](#how-to-run-console)
   - [How to update Docker image?](#how-to-update-docker-image)
-  - [Where to download Netcat under Windows?](where-to-download-netcat-under-windows)
-  - [I'm doing all right, but something is not connected](#i-m-doing-all-right--but-something-is-not-connected)
-  - [I've found error in the code, how can I fix it?](#i-ve-found-error-in-the-code--how-can-i-fix-it)
+  - [Where to download Netcat under Windows?](#where-to-download-netcat-under-windows)
+  - [I'm doing all right, but something is not connected](#im-doing-all-right-but-something-is-not-connected)
+  - [I've found error in the code, how can I fix it?](#ive-found-error-in-the-code-how-can-i-fix-it)
 - [For contributors](#for-contributors)
 - [Authors contacts](#authors-contacts)