Description of problem:
Seeing a lot of 404 links in the markdown files available across the project. 

$find . -name \*.md -exec markdown-link-check {} -v -q \;
FILE: ./extras/cliutils/README.md
[✖] https://github.com/aravindavk/glusterfs-restapi → Status: 404

ERROR: dead links found!

FILE: ./doc/developer-guide/commit-guidelines.md
[✖] mailto:name@example.com → Status: 400

ERROR: dead links found!

FILE: ./doc/developer-guide/gfapi-symbol-versions.md

FILE: ./doc/developer-guide/xlator-classification.md
[✖] TBD → Status: 400 Error: ENOENT: no such file or directory, access '/home/kiyer/upstream/glusterfs/doc/developer-guide/TBD'

ERROR: dead links found!

FILE: ./doc/developer-guide/translator-development.md
[✖] http://www.gluster.org/community/documentation/index.php/Translators → Status: 404

ERROR: dead links found!

FILE: ./doc/developer-guide/options-to-contribute.md
[✖] ./conding-standard.md → Status: 400 Error: ENOENT: no such file or directory, access '/home/kiyer/upstream/glusterfs/doc/developer-guide/conding-standard.md'

ERROR: dead links found!

FILE: ./doc/developer-guide/Using-Gluster-Test-Framework.md

FILE: ./doc/developer-guide/README.md
[✖] ./bd-xlator.md → Status: 400 Error: ENOENT: no such file or directory, access '/home/kiyer/upstream/glusterfs/doc/developer-guide/bd-xlator.md'
[✖] ./coredump-analysis.md → Status: 400 Error: ENOENT: no such file or directory, access '/home/kiyer/upstream/glusterfs/doc/developer-guide/coredump-analysis.md'

ERROR: dead links found!

FILE: ./doc/features/ganesha-ha.md

FILE: ./doc/debugging/statedump.md
[✖] https://github.com/gluster/glusterfs/blob/master/doc/data-structures/mem-pool.md → Status: 404

ERROR: dead links found!

FILE: ./doc/debugging/gfid-to-path.md
[✖] https://gist.github.com/semiosis/4392640 → Status: 404

ERROR: dead links found!

FILE: ./doc/README.md
[✖] http://docs.gluster.org/en/latest/Upgrade-Guide/README/ → Status: 404

ERROR: dead links found!

FILE: ./geo-replication/syncdaemon/README.md
[✖] http://python.net/crew/theller/ctypes/ → Status: 0 Error: ETIMEDOUT

ERROR: dead links found!

Version-Release number of selected component (if applicable):
Whatever is the latest upstream version

How reproducible:
Always

Steps to Reproduce:
1. Install markdown-link-checker using the below command:
# npm install --save markdown-link-check
2. Git clone glusterfs and run markdown_link check using the below command:
$find . -name \*.md -exec markdown-link-check {} -v -q \;

Actual results:
doc contain 404 links.

Expected results:
doc shouldn't contain 404 links.

Additional info: