apt: fixed pkg=<name>=<version> fails if package is not yet installed.

Reported and patch provided by https://github.com/msolo. Closes GH-5625.
Allow explict setting of vpc_security_groups to allow modification of security groups of RDS instances within a VPC
Filter out messages that match the pattern username:password@host

This filtering is done in both the module invocation logging and in
the regular verbose() logging output.

Fixes #4087
Remove fixme and extraneous file.
Update CHANGELOG.md
Allow equal sign in single-line ini variables
Merge pull request #6001 from jimi-c/issue_4087_sanitize_output

Filter out messages that match the pattern username:password@host
Merge branch 'allow-equals-in-ini-vars' of https://github.com/worklez/ansible into worklez-allow-equals-in-ini-vars
Remove superfluous/invalid quote

Allow the example to be copy-pasted with minimal confusion about the error.
Merge pull request #6014 from amirhhz/patch-1

Remove superfluous/invalid quote
Spelling correction
Merge pull request #5645 from resmo/fix/apt_pkg_version

apt: fixed pkg=<name>=<version> fails if package is not yet installed.

Tested and it fixes the problem on more recent versions of apt.
Merge pull request #6015 from angstwad/docfix

Spelling correction.
Config resoution order correction and documentation.
Minor existing typo fix.
Merge branch 'fix_rds_modify_security_group' of https://github.com/mohangk/ansible into mohangk-fix_rds_modify_security_group
Merge pull request #6021 from risaacson/issue_5359_2

Config resoution order correction and documentation.
Merge branch 'mohangk-fix_rds_modify_security_group' into devel
Fixing usage string in ansible-galaxy install for role files
Document "|default" Jinja2 filter example.