Duplicate and redundant wording via Vale

[GuessWhoSamFoo]

Continued from #921 . We never formally adopted this because config files, code snippets tend to run false positives. Filtered through the output via configs in .vale for some reasonable fixes

 docs/applications/project-management/how-to-install-and-configure-redmine-on-ubuntu-16-04.md
 5:160  error  'is' is repeated!  vale.Repetition

 docs/databases/postgresql/how-to-access-postgresql-database-remotely-using-pgadmin-on-windows.md
 43:119  error  'absolutely necessary' is       vale.Redundancy
                redundant

 docs/development/python/use-scrapy-to-extract-data-from-html-tags.md
 204:184  error  'the' is repeated!  vale.Repetition

 docs/networking/diagnostics/diagnosing-network-issues-with-mtr.md
 33:314  error  'most complete' is not          vale.Uncomparables
                comparable

 docs/networking/dns/using-your-systems-hosts-file.md
 42:439  error  'end result' is redundant  vale.Redundancy

 docs/security/firewalls/control-network-traffic-with-iptables.md
 624:379  error  'GUI interface' is redundant  vale.Redundancy

 docs/websites/cms/install-odoo-10-on-ubuntu-16-04.md
 279:35  error  'enter in' is redundant  vale.Redundancy

 docs/websites/proxies/using-apache-for-proxy-and-clustering-services-on-centos-5.md
 118:359  error  'be' is repeated!  vale.Repetition

 docs/websites/proxies/using-apache-for-proxy-and-clustering-services-on-fedora-12.md
 116:358  error  'be' is repeated!  vale.Repetition

 docs/websites/proxies/using-apache-for-proxy-and-clustering-services-on-fedora-14.md
 116:358  error  'be' is repeated!  vale.Repetition

 docs/websites/proxies/using-apache-for-proxy-and-clustering-services-on-debian-5-lenny.md
 122:358  error  'be' is repeated!  vale.Repetition

 docs/websites/proxies/using-apache-for-proxy-and-clustering-services-on-ubuntu-12-04-precise-pangolin.md
 122:358  error  'be' is repeated!  vale.Repetition

 docs/websites/proxies/using-apache-for-proxy-and-clustering-services-on-ubuntu-10-10-maverick.md
 124:358  error  'be' is repeated!  vale.Repetition

 docs/websites/proxies/using-apache-for-proxy-and-clustering-services-on-ubuntu-9-10-karmic.md
 122:358  error  'be' is repeated!  vale.Repetition

 docs/websites/proxies/using-apache-for-proxy-and-clustering-services-on-ubuntu-10-04-lucid.md
 124:358  error  'be' is repeated!  vale.Repetition

[categulario]

for two of the errors described here I couldn't find solutions. Furthermore, I don't see the errors.

In

diagnosing-network-issues-with-mtr.md:33:314  error 'most complete' is not comparable

although it is not being compared to something, doesn't seem to be an error.

Then in

docs/databases/postgresql/how-to-access-postgresql-database-remotely-using-pgadmin-on-windows.md:43:119 error 'absolutely necessary' is redundant

I can see the redundancy (event though it's common in colloquial speaking) but I can also see the reason: it is discouraging its usage and emphasizing that one should have a good reason for doing such thing.

The only solution I can think of is replacing the whole sentence and use a different approach.

[GuessWhoSamFoo]

Yup, there are definitely output here that aren't actionable atm. If it looks okay, probably fine to just disregard