Adding a lot of Beej's Guides and their official translations. (#4888)

* Beej's Guide to Network Programming - Using Internet Sockets

Added 9 translations:
Chinese
French
German
Italian
Korean
Brazilian Portuguese
Polish
Russian
Turkish

* Beej's Guide to Python Programming For Beginners

Added translations:
English

* Beej's Guide to Unix Interprocess Communication

Added Translations:
English

* Beej's Guide to C Programming

Adding formats.

* Beej's Guide to the GNU Debugger (GDB)

Added translations:
English
Russian

* Added translator names to the books.

Added Translator name for:
German
Italian
Polish
Brazilian Portuguese
Russian
Turkish
Chinese
No translator name found:
French
Korean

* Added author along with the translation!!

free-programming-books-zh.md

@@ -319,6 +319,7 @@
 
 ### C
 
+* [Beej's Guide to Network Programming 簡體中文版](https://firebasestorage.googleapis.com/v0/b/gitbook-28427.appspot.com/o/assets%2F-ME5zR-03ZEHgp2kv7bW%2F-MF9EIY-s19_w19_Unae%2F-MF9F-HCs1nLOkY1mLVi%2FBeej-cn-20140429.zip?alt=media&token=de27f96b-2aed-4c97-8879-649638c7559f) - B. Hall, 廖亚伦译 (PDF)
 * [C 语言常见问题集](http://c-faq-chn.sourceforge.net/ccfaq/ccfaq.html)
 * [Linux C 编程一站式学习](http://docs.linuxtone.org/ebooks/C&CPP/c/)
 * [新概念 C 语言教程](https://github.com/limingth/NCCL)