Fix to pulling from an unknown server.
Fix to pulling from an unknown server.

- a server having a non-existing internet name gives
  "php_network_getaddresses:
  getaddrinfo failed: Name or service not known"
  on pull.
crruthe/MISP,Maijin/MISP,cristianbell/MISP,Maijin/MISP,regit/MISP,TheDr1ver/MISP,FIRSTdotorg/MISP,crruthe/MISP,MISP/MISP,regit/MISP,SteveClement/MISP,aaronkaplan/MISP,devnull-/MISP,x86Labs/MISP,devnull-/MISP,x86Labs/MISP,pombredanne/MISP,cristianbell/MISP,jiekechoo/MISP,regit/MISP,FIRSTdotorg/MISP,SteveClement/MISP,MISP/MISP,MISP/MISP,jiekechoo/MISP,devnull-/MISP,RichieB2B/MISP,triplekill/MISP,RichieB2B/MISP,pombredanne/MISP,RichieB2B/MISP,SteveClement/MISP,MISP/MISP,crruthe/MISP,FloatingGhost/MISP,FloatingGhost/MISP,0x0mar/MISP,Rafiot/MISP,TheDr1ver/MISP,TheDr1ver/MISP,x86Labs/MISP,RichieB2B/MISP,crruthe/MISP,triplekill/MISP,FloatingGhost/MISP,elhoim/MISP,cristianbell/MISP,jiekechoo/MISP,cristianbell/MISP,MISP/MISP,Rafiot/MISP,devnull-/MISP,x86Labs/MISP,FloatingGhost/MISP,FIRSTdotorg/MISP,aaronkaplan/MISP,elhoim/MISP,SteveClement/MISP,Rafiot/MISP,0x0mar/MISP,jiekechoo/MISP,triplekill/MISP,pombredanne/MISP,Maijin/MISP,Rafiot/MISP,FIRSTdotorg/MISP,SteveClement/MISP,triplekill/MISP,0x0mar/MISP,elhoim/MISP,0x0mar/MISP,elhoim/MISP,pombredanne/MISP,aaronkaplan/MISP,TheDr1ver/MISP,Maijin/MISP,regit/MISP,aaronkaplan/MISP