Increase specificity of [url][img] capture regex in BBCode::getAttachedData
Increase specificity of [url][img] capture regex in BBCode::getAttachedData

- Prevents it from over capturing when there's a [url] tag before the image

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