gnrc/netreg: optimize lookup and getnext
gnrc/netreg: optimize lookup and getnext

authmillenon/RIOT,yogo1212/RIOT,cladmi/RIOT,kbumsik/RIOT,smlng/RIOT,jasonatran/RIOT,BytesGalore/RIOT,neiljay/RIOT,neiljay/RIOT,OlegHahm/RIOT,basilfx/RIOT,rfuentess/RIOT,kYc0o/RIOT,kbumsik/RIOT,josephnoir/RIOT,aeneby/RIOT,OTAkeys/RIOT,LudwigKnuepfer/RIOT,kaspar030/RIOT,ant9000/RIOT,yogo1212/RIOT,RIOT-OS/RIOT,authmillenon/RIOT,smlng/RIOT,lazytech-org/RIOT,LudwigKnuepfer/RIOT,avmelnikoff/RIOT,kYc0o/RIOT,x3ro/RIOT,yogo1212/RIOT,mtausig/RIOT,biboc/RIOT,toonst/RIOT,OlegHahm/RIOT,cladmi/RIOT,RIOT-OS/RIOT,miri64/RIOT,cladmi/RIOT,rfuentess/RIOT,LudwigOrtmann/RIOT,cladmi/RIOT,ant9000/RIOT,smlng/RIOT,BytesGalore/RIOT,biboc/RIOT,A-Paul/RIOT,x3ro/RIOT,gebart/RIOT,authmillenon/RIOT,authmillenon/RIOT,A-Paul/RIOT,mfrey/RIOT,jasonatran/RIOT,authmillenon/RIOT,miri64/RIOT,basilfx/RIOT,BytesGalore/RIOT,aeneby/RIOT,mfrey/RIOT,x3ro/RIOT,avmelnikoff/RIOT,kaspar030/RIOT,gebart/RIOT,ant9000/RIOT,jasonatran/RIOT,LudwigOrtmann/RIOT,LudwigOrtmann/RIOT,yogo1212/RIOT,OlegHahm/RIOT,RIOT-OS/RIOT,OTAkeys/RIOT,mfrey/RIOT,aeneby/RIOT,LudwigOrtmann/RIOT,rfuentess/RIOT,gebart/RIOT,josephnoir/RIOT,rfuentess/RIOT,neiljay/RIOT,mtausig/RIOT,jasonatran/RIOT,josephnoir/RIOT,OTAkeys/RIOT,LudwigKnuepfer/RIOT,mfrey/RIOT,smlng/RIOT,miri64/RIOT,kYc0o/RIOT,lazytech-org/RIOT,kbumsik/RIOT,mfrey/RIOT,lazytech-org/RIOT,mtausig/RIOT,OlegHahm/RIOT,toonst/RIOT,gebart/RIOT,kaspar030/RIOT,avmelnikoff/RIOT,LudwigKnuepfer/RIOT,miri64/RIOT,mtausig/RIOT,smlng/RIOT,cladmi/RIOT,miri64/RIOT,BytesGalore/RIOT,basilfx/RIOT,OlegHahm/RIOT,aeneby/RIOT,lazytech-org/RIOT,x3ro/RIOT,LudwigOrtmann/RIOT,kaspar030/RIOT,kYc0o/RIOT,kbumsik/RIOT,kYc0o/RIOT,LudwigKnuepfer/RIOT,OTAkeys/RIOT,avmelnikoff/RIOT,toonst/RIOT,biboc/RIOT,OTAkeys/RIOT,toonst/RIOT,toonst/RIOT,yogo1212/RIOT,kbumsik/RIOT,neiljay/RIOT,rfuentess/RIOT,RIOT-OS/RIOT,basilfx/RIOT,basilfx/RIOT,RIOT-OS/RIOT,lazytech-org/RIOT,gebart/RIOT,yogo1212/RIOT,avmelnikoff/RIOT,BytesGalore/RIOT,A-Paul/RIOT,aeneby/RIOT,josephnoir/RIOT,A-Paul/RIOT,x3ro/RIOT,mtausig/RIOT,ant9000/RIOT,A-Paul/RIOT,josephnoir/RIOT,ant9000/RIOT,jasonatran/RIOT,biboc/RIOT,neiljay/RIOT,kaspar030/RIOT,LudwigOrtmann/RIOT,authmillenon/RIOT,biboc/RIOT