Revert renaming lang to language in api
Revert renaming lang to language in api

- Normalize some quotes
- Put "Empty user-agent" log message in a else statement

fabrixxm/friendica,annando/friendica,tobiasd/friendica,fabrixxm/friendica,friendica/friendica,annando/friendica,annando/friendica,tobiasd/friendica,annando/friendica,fabrixxm/friendica,annando/friendica,fabrixxm/friendica,tobiasd/friendica,friendica/friendica,friendica/friendica,fabrixxm/friendica,friendica/friendica,friendica/friendica,tobiasd/friendica,tobiasd/friendica