net-misc/curl/metadata.xml describes rtmp as: "Enable Enables RTMPDump Streaming Media support" Reproducible: Always Steps to Reproduce: 1. equery u curl Actual Results: ... - - rtmp : Enable Enables RTMPDump Streaming Media support ... Expected Results: ... - - rtmp : Enable RTMPDump Streaming Media support ...
I have fixed that. The problem remains that "RMPTDump" isn't a kind of "Streaming Media" that net-misc/curl supports. RTMP, however, is. "<pkg>media-video/rtmpdump</pkg>" is a string you might want to include in the USE flag description, though.