Documentation edit for vsphere_guest module

Noted in documentation that standalone esxi hosts should use ha-datacenter for the datacenter string

Fixes #8810

Fixes #8898

Fixes #8890

Move some comments to the unittest as we might look at that if we decide
to refactor the code.

the passwords are correctly hidden in the output.

* makes speed acceptable for some datasets
* obfuscates multiple detected passwords
* obfuscates more characters to account for some corner cases when
  trying to detect passwords.

Fixes #8364

Fix for #8886. Correct state=absent for statements without name/alias.

Make ssh debug easier to read and paste

fix typo in zypper module (requiered -> required)

Fix #8666 for real

Fixes #8861

Fixes #8884

Currently, ansible -vvvv show the following:

    hostname EXEC ['ssh', '-C', '-vvv', '-o', 'ControlMaster=auto',

This is not good if someone want to cut and paste it to see if something
is wrong with the command line, so join the dictionnary strings with spaces
to have 1 string in the output.

Issue 8872: use getpass.getpass() to read password.

Fixes #8758

This avoids passing the plaintext raw password into the script as a
command-line argument, which shells such as bash and zsh will
typically log into a file like ~/bash_history.

As a small bonus, this works a LOT more smoothly if the user's
password has characters in it that either the shell or Python syntax
might like to interpret as metacharacters, like '\' or '"'.

getpass.getpass() is part of Python's standard library in all versions
between 2.4 and 3.3 at least.

Commit 311ec543 ("If not specified, do not modify subnet/route_tables for ec2 VPCs") mostly fixed the problem, except that it left defaults for subnets and route_tables so that not specifying them still deleted them.

Memcached factcache improvements

docs: Add versionadded for run_once

zabbix_maintenance: move to new boilerplate

rax modules: Perform region validation early

Add additional Azure Regions

Merge branch 'npm-ignore-scripts' of https://github.com/tkellen/ansible into tkellen-npm-ignore-scripts

Handle exceptions during config file parsing

Supporting SSL cert location on SunOS (SmartOS, really)

Fix description on quantum_subnet module

Update playbooks_variables.rst