gnrc_netreg: enhance doc on entry initialization
gnrc_netreg: enhance doc on entry initialization

jasonatran/RIOT,adrianghc/RIOT,adjih/RIOT,cladmi/RIOT,josephnoir/RIOT,aeneby/RIOT,biboc/RIOT,miri64/RIOT,ks156/RIOT,immesys/RiSyn,LudwigOrtmann/RIOT,neiljay/RIOT,kYc0o/RIOT,ks156/RIOT,kbumsik/RIOT,x3ro/RIOT,plushvoxel/RIOT,kaspar030/RIOT,thomaseichinger/RIOT,cladmi/RIOT,hamilton-mote/RIOT-OS,BytesGalore/RIOT,beurdouche/RIOT,kerneltask/RIOT,ks156/RIOT,yogo1212/RIOT,x3ro/RIOT,miri64/RIOT,mfrey/RIOT,neiljay/RIOT,Josar/RIOT,hamilton-mote/RIOT-OS,toonst/RIOT,gebart/RIOT,RIOT-OS/RIOT,mtausig/RIOT,Josar/RIOT,kaspar030/RIOT,plushvoxel/RIOT,OTAkeys/RIOT,ant9000/RIOT,roberthartung/RIOT,biboc/RIOT,aeneby/RIOT,basilfx/RIOT,adjih/RIOT,LudwigOrtmann/RIOT,A-Paul/RIOT,adjih/RIOT,BytesGalore/RIOT,LudwigOrtmann/RIOT,RIOT-OS/RIOT,Josar/RIOT,rfuentess/RIOT,A-Paul/RIOT,x3ro/RIOT,yogo1212/RIOT,neiljay/RIOT,kYc0o/RIOT,RIOT-OS/RIOT,kYc0o/RIOT,OlegHahm/RIOT,authmillenon/RIOT,hamilton-mote/RIOT-OS,immesys/RiSyn,avmelnikoff/RIOT,BytesGalore/RIOT,beurdouche/RIOT,adrianghc/RIOT,smlng/RIOT,mtausig/RIOT,jasonatran/RIOT,avmelnikoff/RIOT,yogo1212/RIOT,adrianghc/RIOT,beurdouche/RIOT,authmillenon/RIOT,mfrey/RIOT,kerneltask/RIOT,kYc0o/RIOT,jasonatran/RIOT,josephnoir/RIOT,immesys/RiSyn,ant9000/RIOT,yogo1212/RIOT,mfrey/RIOT,biboc/RIOT,kbumsik/RIOT,authmillenon/RIOT,josephnoir/RIOT,neiljay/RIOT,LudwigKnuepfer/RIOT,rfuentess/RIOT,immesys/RiSyn,cladmi/RIOT,A-Paul/RIOT,roberthartung/RIOT,neiljay/RIOT,thomaseichinger/RIOT,lazytech-org/RIOT,ant9000/RIOT,lazytech-org/RIOT,OTAkeys/RIOT,rfuentess/RIOT,roberthartung/RIOT,kaspar030/RIOT,cladmi/RIOT,lazytech-org/RIOT,avmelnikoff/RIOT,yogo1212/RIOT,cladmi/RIOT,toonst/RIOT,authmillenon/RIOT,kerneltask/RIOT,immesys/RiSyn,adjih/RIOT,Josar/RIOT,LudwigOrtmann/RIOT,OlegHahm/RIOT,OlegHahm/RIOT,RIOT-OS/RIOT,x3ro/RIOT,roberthartung/RIOT,ks156/RIOT,hamilton-mote/RIOT-OS,gebart/RIOT,beurdouche/RIOT,thomaseichinger/RIOT,yogo1212/RIOT,RIOT-OS/RIOT,ant9000/RIOT,LudwigOrtmann/RIOT,LudwigKnuepfer/RIOT,avmelnikoff/RIOT,BytesGalore/RIOT,BytesGalore/RIOT,aeneby/RIOT,kbumsik/RIOT,adrianghc/RIOT,basilfx/RIOT,miri64/RIOT,kerneltask/RIOT,jasonatran/RIOT,OTAkeys/RIOT,OTAkeys/RIOT,lazytech-org/RIOT,kYc0o/RIOT,avmelnikoff/RIOT,beurdouche/RIOT,immesys/RiSyn,smlng/RIOT,roberthartung/RIOT,authmillenon/RIOT,aeneby/RIOT,adrianghc/RIOT,thomaseichinger/RIOT,josephnoir/RIOT,biboc/RIOT,gebart/RIOT,hamilton-mote/RIOT-OS,jasonatran/RIOT,plushvoxel/RIOT,rfuentess/RIOT,x3ro/RIOT,kaspar030/RIOT,gebart/RIOT,toonst/RIOT,adjih/RIOT,A-Paul/RIOT,toonst/RIOT,basilfx/RIOT,kaspar030/RIOT,kbumsik/RIOT,mtausig/RIOT,biboc/RIOT,LudwigOrtmann/RIOT,mtausig/RIOT,LudwigKnuepfer/RIOT,A-Paul/RIOT,OTAkeys/RIOT,aeneby/RIOT,toonst/RIOT,authmillenon/RIOT,kerneltask/RIOT,gebart/RIOT,ant9000/RIOT,LudwigKnuepfer/RIOT,plushvoxel/RIOT,josephnoir/RIOT,miri64/RIOT,ks156/RIOT,smlng/RIOT,mfrey/RIOT,OlegHahm/RIOT,basilfx/RIOT,miri64/RIOT,lazytech-org/RIOT,kbumsik/RIOT,basilfx/RIOT,rfuentess/RIOT,smlng/RIOT,plushvoxel/RIOT,OlegHahm/RIOT,LudwigKnuepfer/RIOT,mtausig/RIOT,mfrey/RIOT,thomaseichinger/RIOT,Josar/RIOT,smlng/RIOT