fixing php notice

we should at least initialize all our important variables
Use \Request instead of $_SERVER. Working on #2334
Yoda bad statement is.
Merge branch 'master' into refactor/protocol-detection
Merge pull request #2337 from jadwigo/master

fixing php notice
Prevent " Can't use method return value in write context"
Temporarily disable this test. Need to fix properly
Tweaking protocol detection for HTTPS.
Merge pull request #2338 from bobdenotter/refactor/protocol-detection

Refactor/protocol detection
Bumping version to 2.0.1 for minor release.
Merge pull request #2339 from bobdenotter/master

Bumping version to 2.0.1 for minor release.
Add setting to config dist
Make stack panel switchable
Make 'select from stack' button switchable
Make 'place on stack' button switchable
Add sniff to check variable naming
Merge pull request #2341 from rarila/variable-name-sniff

Add sniff to check variable naming
rename "general/interface/…" to "general/backend/…"
Update changelog
Merge pull request #2340 from rarila/stack-disable

Option to disable stack usage