This network module will put every message/notice beginning with (p!) in front of the ZNC's send queue.
It was created specifically for SteamDB's bot, as it can get quite spammy and responses to user commands could get queued for a while.
Use at your own risk, I provide absolutely no guarantees that it won't crash or burn your server down.
Building:
znc-dev
package installed to makeznc-buildmod
availableCXXFLAGS="-std=c++11" znc-buildmod prioritysend.cpp