Move the sending of attachments headers into a single function to reduce duplication
Move the sending of attachments headers into a single function to reduce duplication

elkarte/Elkarte,interlab/Elkarte,nwsw/Elkarte,emanuele45/Dialogo,StealthWombat/How-to-fork-an-Elk,elkarte/Elkarte,nwsw/Elkarte,emanuele45/Dialogo,StealthWombat/How-to-fork-an-Elk,elkarte/Elkarte,interlab/Elkarte,nwsw/Elkarte,Spuds/Elkarte,Spuds/Elkarte,Spuds/Elkarte,emanuele45/Dialogo,StealthWombat/How-to-fork-an-Elk,interlab/Elkarte,StealthWombat/How-to-fork-an-Elk