Further improvements to the freetext regex to remove unprintable chars
Further improvements to the freetext regex to remove unprintable chars

cristianbell/MISP,TheDr1ver/MISP,triplekill/MISP,cristianbell/MISP,FloatingGhost/MISP,crruthe/MISP,jiekechoo/MISP,elhoim/MISP,aaronkaplan/MISP,devnull-/MISP,RichieB2B/MISP,regit/MISP,0x0mar/MISP,Maijin/MISP,SteveClement/MISP,triplekill/MISP,pombredanne/MISP,cristianbell/MISP,crruthe/MISP,FloatingGhost/MISP,jiekechoo/MISP,0x0mar/MISP,pombredanne/MISP,RichieB2B/MISP,regit/MISP,x86Labs/MISP,crruthe/MISP,regit/MISP,Rafiot/MISP,0x0mar/MISP,SteveClement/MISP,pombredanne/MISP,Maijin/MISP,FloatingGhost/MISP,0x0mar/MISP,elhoim/MISP,Rafiot/MISP,TheDr1ver/MISP,FIRSTdotorg/MISP,devnull-/MISP,crruthe/MISP,devnull-/MISP,RichieB2B/MISP,jiekechoo/MISP,x86Labs/MISP,SteveClement/MISP,aaronkaplan/MISP,x86Labs/MISP,MISP/MISP,aaronkaplan/MISP,elhoim/MISP,MISP/MISP,aaronkaplan/MISP,SteveClement/MISP,TheDr1ver/MISP,RichieB2B/MISP,SteveClement/MISP,regit/MISP,cristianbell/MISP,MISP/MISP,FIRSTdotorg/MISP,x86Labs/MISP,elhoim/MISP,pombredanne/MISP,MISP/MISP,Rafiot/MISP,MISP/MISP,TheDr1ver/MISP,triplekill/MISP,triplekill/MISP,Maijin/MISP,FIRSTdotorg/MISP,Maijin/MISP,Rafiot/MISP,jiekechoo/MISP,FloatingGhost/MISP,FIRSTdotorg/MISP,devnull-/MISP