blocks: refactored stream_mux to be more flexible with buffer sizes
Use VERBATIM in custom commands to fix quoting, to make CMake happy with the Python command being issued
Merge remote-tracking branch 'martin/blocks/stream_mux'
Merge remote-tracking branch 'michaelld/fix_Wno_dev_warnings' into maint
Merge branch 'maint'
Merge branch 'master' into next