Merge pull request DataDog#3433 from DataDog/revert-3428-gus/dashboar…

…d-pop

Revert "Adding dashboard popularity and list"

Merge pull request DataDog#3413 from DataDog/ruth/trace-search-setup

Add trace search setup instructions

Merge pull request DataDog#3412 from DataDog/nils/log-multi-monitor

Update Log monitor doc

Merge pull request DataDog#3430 from DataDog/marc.tremsal/security-do…

…cs-nov18

Add Networking and Proxying section to public security docs

Merge pull request DataDog#3429 from DataDog/gus/agent-integrations

Removing agent check doc and redirecting to integration section

Merge pull request DataDog#3423 from DataDog/MargotLepizzera-dockerco…

…mpose-multiline-regex

Escaping backslash for logs collection with Docker compose

Merge pull request DataDog#3419 from DataDog/gus/custom-metrics

Removing stale content

Merge pull request DataDog#3119 from DataDog/kyle-verhoog/python-open…

…tracing

[apm/python] Add OpenTracing reference + small fixes

Merge pull request DataDog#3130 from DataDog/gus/real-logo

Using official logo

Merge pull request DataDog#3129 from DataDog/david.jones/imgurl-partial

use hashed img path for og image default