Clean up gitignores (#4688)

I just got bitten by a file being caught by the .gitignore, which shouldn't
have been, and am now pissed off with the .gitignore. I have basically declared
bankruptcy on it and started again.

.gitignore

-*.pyc
-.*.swp
+# filename patterns
 *~
-*.lock
-
-.DS_Store
-_trial_temp/
-_trial_temp*/
-logs/
-dbs/
+.*.swp
+.#*
+*.deb
 *.egg
-dist/
-docs/build/
 *.egg-info
-pip-wheel-metadata/
-
-cmdclient_config.json
-homeserver*.db
-homeserver*.log
-homeserver*.log.*
-homeserver*.pid
-/homeserver*.yaml
-
-*.signing.key
-*.tls.crt
-*.tls.dh
-*.tls.key
-
-.coverage*
-coverage.*
-!.coveragerc
-htmlcov
-
-demo/*/*.db
-demo/*/*.log
-demo/*/*.log.*
-demo/*/*.pid
-demo/media_store.*
-demo/etc
-
-uploads
-cache
-
-.idea/
-media_store/
-
+*.lock
+*.pyc
 *.tac
+_trial_temp/
+_trial_temp*/
 
-build/
-venv/
-venv*/
-*venv/
-
-localhost-800*/
-static/client/register/register_config.js
-.tox
-
-env/
-*.config
+# stuff that is likely to exist when you run a server locally
+/*.signing.key
+/*.tls.crt
+/*.tls.key
+/uploads
+/media_store/
+
+# IDEs
+/.idea/
+/.ropeproject/
+/.vscode/
+
+# build products
+/.coverage*
+!/.coveragerc
+/.tox
+/build/
+/coverage.*
+/dist/
+/docs/build/
+/htmlcov
+/pip-wheel-metadata/
 
-.vscode/
-.ropeproject/
-*.deb
-/debs

changelog.d/4688.misc

+Clean up gitignores

demo/.gitignore

+*.db
+*.log
+*.log.*
+*.pid
+
+/media_store.*
+/etc