MINOR: mux-quic: rename stream purge function

Rename qc_release_detached_streams() to qc_purge_streams(). The aim is
to have a more generic name. It's expected to complete this function to
add other criteria to purge dead streams.

Also the function documentation has been corrected. It does not return a
number of streams. Instead it is a boolean value, to true if at least
one stream was released.
1 file changed