ng_pktbuf: minor doc fixes
ng_pktbuf: minor doc fixes

kaspar030/RIOT,beurdouche/RIOT,arvindpdmn/RIOT,LudwigOrtmann/RIOT,mziegert/RIOT,yogo1212/RIOT,OTAkeys/RIOT,abkam07/RIOT,dkm/RIOT,authmillenon/RIOT,authmillenon/RIOT,herrfz/RIOT,BytesGalore/RIOT,OlegHahm/RIOT,daniel-k/RIOT,haoyangyu/RIOT,dhruvvyas90/RIOT,wentaoshang/RIOT,RubikonAlpha/RIOT,ThanhVic/RIOT,cladmi/RIOT,msolters/RIOT,jbeyerstedt/RIOT-OTA-update,malosek/RIOT,LudwigOrtmann/RIOT,JensErdmann/RIOT,jremmert-phytec-iot/RIOT,jasonatran/RIOT,zhuoshuguo/RIOT,gautric/RIOT,kerneltask/RIOT,neiljay/RIOT,robixnai/RIOT,lazytech-org/RIOT,luciotorre/RIOT,DipSwitch/RIOT,brettswann/RIOT,altairpearl/RIOT,ks156/RIOT,MonsterCode8000/RIOT,adrianghc/RIOT,msolters/RIOT,DipSwitch/RIOT,MonsterCode8000/RIOT,aeneby/RIOT,mziegert/RIOT,jfischer-phytec-iot/RIOT,neumodisch/RIOT,RBartz/RIOT,attdona/RIOT,rajma996/RIOT,Lexandro92/RIOT-CoAP,abkam07/RIOT,Osblouf/RIOT,alignan/RIOT,kaleb-himes/RIOT,zhuoshuguo/RIOT,Ell-i/RIOT,aeneby/RIOT,A-Paul/RIOT,khhhh/RIOT,binarylemon/RIOT,tfar/RIOT,lebrush/RIOT,cladmi/RIOT,robixnai/RIOT,LudwigKnuepfer/RIOT,latsku/RIOT,neiljay/RIOT,RubikonAlpha/RIOT,dhruvvyas90/RIOT,malosek/RIOT,kaspar030/RIOT,daniel-k/RIOT,asanka-code/RIOT,herrfz/RIOT,rousselk/RIOT,MarkXYang/RIOT,kbumsik/RIOT,plushvoxel/RIOT,A-Paul/RIOT,roberthartung/RIOT,OlegHahm/RIOT,hamilton-mote/RIOT-OS,Hyungsin/RIOT-OS,jremmert-phytec-iot/RIOT,aeneby/RIOT,lebrush/RIOT,wentaoshang/RIOT,JensErdmann/RIOT,syin2/RIOT,abkam07/RIOT,DipSwitch/RIOT,luciotorre/RIOT,rousselk/RIOT,x3ro/RIOT,kb2ma/RIOT,RBartz/RIOT,rajma996/RIOT,dkm/RIOT,d00616/RIOT,smlng/RIOT,haoyangyu/RIOT,d00616/RIOT,JensErdmann/RIOT,avmelnikoff/RIOT,arvindpdmn/RIOT,MohmadAyman/RIOT,LudwigOrtmann/RIOT,dailab/RIOT,katezilla/RIOT,ThanhVic/RIOT,Ell-i/RIOT,abp719/RIOT,zhuoshuguo/RIOT,adrianghc/RIOT,kYc0o/RIOT,LudwigOrtmann/RIOT,Darredevil/RIOT,mziegert/RIOT,OTAkeys/RIOT,jremmert-phytec-iot/RIOT,malosek/RIOT,stevenj/RIOT,OlegHahm/RIOT,shady33/RIOT,openkosmosorg/RIOT,backenklee/RIOT,alex1818/RIOT,mziegert/RIOT,authmillenon/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,alex1818/RIOT,jremmert-phytec-iot/RIOT,LudwigKnuepfer/RIOT,DipSwitch/RIOT,authmillenon/RIOT,daniel-k/RIOT,DipSwitch/RIOT,latsku/RIOT,adrianghc/RIOT,kbumsik/RIOT,biboc/RIOT,OlegHahm/RIOT,rakendrathapa/RIOT,arvindpdmn/RIOT,shady33/RIOT,bartfaizoltan/RIOT,MarkXYang/RIOT,wentaoshang/RIOT,RubikonAlpha/RIOT,malosek/RIOT,ant9000/RIOT,dailab/RIOT,basilfx/RIOT,plushvoxel/RIOT,x3ro/RIOT,msolters/RIOT,rfuentess/RIOT,aeneby/RIOT,MonsterCode8000/RIOT,RIOT-OS/RIOT,lazytech-org/RIOT,gebart/RIOT,khhhh/RIOT,FrancescoErmini/RIOT,bartfaizoltan/RIOT,Yonezawa-T2/RIOT,haoyangyu/RIOT,zhuoshuguo/RIOT,ThanhVic/RIOT,dkm/RIOT,miri64/RIOT,ks156/RIOT,khhhh/RIOT,dkm/RIOT,MonsterCode8000/RIOT,abp719/RIOT,wentaoshang/RIOT,luciotorre/RIOT,Ell-i/RIOT,daniel-k/RIOT,ThanhVic/RIOT,d00616/RIOT,TobiasFredersdorf/RIOT,altairpearl/RIOT,thiagohd/RIOT,robixnai/RIOT,asanka-code/RIOT,basilfx/RIOT,altairpearl/RIOT,jremmert-phytec-iot/RIOT,thiagohd/RIOT,automote/RIOT,rakendrathapa/RIOT,automote/RIOT,aeneby/RIOT,Ell-i/RIOT,jfischer-phytec-iot/RIOT,RIOT-OS/RIOT,smlng/RIOT,lazytech-org/RIOT,adjih/RIOT,MohmadAyman/RIOT,yogo1212/RIOT,LudwigKnuepfer/RIOT,jfischer-phytec-iot/RIOT,Lexandro92/RIOT-CoAP,lazytech-org/RIOT,BytesGalore/RIOT,gbarnett/RIOT,d00616/RIOT,miri64/RIOT,immesys/RiSyn,brettswann/RIOT,shady33/RIOT,bartfaizoltan/RIOT,hamilton-mote/RIOT-OS,automote/RIOT,roberthartung/RIOT,ks156/RIOT,LudwigKnuepfer/RIOT,RubikonAlpha/RIOT,rakendrathapa/RIOT,JensErdmann/RIOT,gbarnett/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,binarylemon/RIOT,kbumsik/RIOT,roberthartung/RIOT,stevenj/RIOT,rfuentess/RIOT,robixnai/RIOT,attdona/RIOT,binarylemon/RIOT,gebart/RIOT,Lexandro92/RIOT-CoAP,MohmadAyman/RIOT,Lexandro92/RIOT-CoAP,toonst/RIOT,RIOT-OS/RIOT,l3nko/RIOT,jbeyerstedt/RIOT-OTA-update,OTAkeys/RIOT,brettswann/RIOT,beurdouche/RIOT,kYc0o/RIOT,kaleb-himes/RIOT,beurdouche/RIOT,JensErdmann/RIOT,rakendrathapa/RIOT,mtausig/RIOT,jasonatran/RIOT,altairpearl/RIOT,dhruvvyas90/RIOT,josephnoir/RIOT,herrfz/RIOT,binarylemon/RIOT,beurdouche/RIOT,brettswann/RIOT,ThanhVic/RIOT,daniel-k/RIOT,mfrey/RIOT,kaspar030/RIOT,miri64/RIOT,gebart/RIOT,MohmadAyman/RIOT,latsku/RIOT,toonst/RIOT,thomaseichinger/RIOT,shady33/RIOT,lazytech-org/RIOT,dailab/RIOT,asanka-code/RIOT,rfuentess/RIOT,miri64/RIOT,l3nko/RIOT,ks156/RIOT,kb2ma/RIOT,jasonatran/RIOT,adrianghc/RIOT,avmelnikoff/RIOT,Yonezawa-T2/RIOT,x3ro/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,patkan/RIOT,mfrey/RIOT,rajma996/RIOT,abp719/RIOT,RBartz/RIOT,Osblouf/RIOT,neiljay/RIOT,gbarnett/RIOT,kaleb-himes/RIOT,mfrey/RIOT,EmuxEvans/RIOT,latsku/RIOT,RBartz/RIOT,Yonezawa-T2/RIOT,alignan/RIOT,BytesGalore/RIOT,latsku/RIOT,A-Paul/RIOT,watr-li/RIOT,LudwigKnuepfer/RIOT,Josar/RIOT,l3nko/RIOT,miri64/RIOT,rousselk/RIOT,malosek/RIOT,luciotorre/RIOT,plushvoxel/RIOT,syin2/RIOT,dailab/RIOT,yogo1212/RIOT,Ell-i/RIOT,kbumsik/RIOT,kaleb-himes/RIOT,rakendrathapa/RIOT,yogo1212/RIOT,MarkXYang/RIOT,Josar/RIOT,Osblouf/RIOT,hamilton-mote/RIOT-OS,alex1818/RIOT,shady33/RIOT,josephnoir/RIOT,tfar/RIOT,kbumsik/RIOT,rousselk/RIOT,kYc0o/RIOT,Darredevil/RIOT,BytesGalore/RIOT,patkan/RIOT,watr-li/RIOT,Yonezawa-T2/RIOT,MarkXYang/RIOT,RBartz/RIOT,biboc/RIOT,stevenj/RIOT,plushvoxel/RIOT,gbarnett/RIOT,alex1818/RIOT,FrancescoErmini/RIOT,gbarnett/RIOT,jfischer-phytec-iot/RIOT,d00616/RIOT,mtausig/RIOT,Hyungsin/RIOT-OS,katezilla/RIOT,OlegHahm/RIOT,mfrey/RIOT,FrancescoErmini/RIOT,FrancescoErmini/RIOT,biboc/RIOT,gebart/RIOT,ant9000/RIOT,TobiasFredersdorf/RIOT,backenklee/RIOT,rfuentess/RIOT,RIOT-OS/RIOT,patkan/RIOT,biboc/RIOT,patkan/RIOT,dhruvvyas90/RIOT,hamilton-mote/RIOT-OS,kaleb-himes/RIOT,EmuxEvans/RIOT,MonsterCode8000/RIOT,x3ro/RIOT,neumodisch/RIOT,thomaseichinger/RIOT,ant9000/RIOT,Josar/RIOT,Darredevil/RIOT,MohmadAyman/RIOT,kaspar030/RIOT,khhhh/RIOT,haoyangyu/RIOT,mfrey/RIOT,Darredevil/RIOT,khhhh/RIOT,MarkXYang/RIOT,OTAkeys/RIOT,neumodisch/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,zhuoshuguo/RIOT,mtausig/RIOT,gbarnett/RIOT,thiagohd/RIOT,immesys/RiSyn,alex1818/RIOT,abkam07/RIOT,ntrtrung/RIOT,EmuxEvans/RIOT,gautric/RIOT,avmelnikoff/RIOT,kYc0o/RIOT,Lexandro92/RIOT-CoAP,toonst/RIOT,jbeyerstedt/RIOT-OTA-update,binarylemon/RIOT,ntrtrung/RIOT,patkan/RIOT,kb2ma/RIOT,kerneltask/RIOT,ntrtrung/RIOT,yogo1212/RIOT,arvindpdmn/RIOT,dailab/RIOT,syin2/RIOT,daniel-k/RIOT,arvindpdmn/RIOT,FrancescoErmini/RIOT,brettswann/RIOT,Osblouf/RIOT,EmuxEvans/RIOT,adjih/RIOT,cladmi/RIOT,Yonezawa-T2/RIOT,EmuxEvans/RIOT,ks156/RIOT,Lexandro92/RIOT-CoAP,RubikonAlpha/RIOT,roberthartung/RIOT,watr-li/RIOT,wentaoshang/RIOT,toonst/RIOT,thomaseichinger/RIOT,ntrtrung/RIOT,rousselk/RIOT,authmillenon/RIOT,ant9000/RIOT,kaspar030/RIOT,tfar/RIOT,abkam07/RIOT,jfischer-phytec-iot/RIOT,arvindpdmn/RIOT,stevenj/RIOT,Hyungsin/RIOT-OS,alignan/RIOT,MohmadAyman/RIOT,cladmi/RIOT,neiljay/RIOT,shady33/RIOT,smlng/RIOT,alignan/RIOT,bartfaizoltan/RIOT,l3nko/RIOT,attdona/RIOT,altairpearl/RIOT,OTAkeys/RIOT,syin2/RIOT,abkam07/RIOT,backenklee/RIOT,katezilla/RIOT,malosek/RIOT,Josar/RIOT,DipSwitch/RIOT,EmuxEvans/RIOT,Hyungsin/RIOT-OS,herrfz/RIOT,immesys/RiSyn,d00616/RIOT,openkosmosorg/RIOT,neumodisch/RIOT,zhuoshuguo/RIOT,kYc0o/RIOT,TobiasFredersdorf/RIOT,smlng/RIOT,kerneltask/RIOT,jremmert-phytec-iot/RIOT,abp719/RIOT,authmillenon/RIOT,A-Paul/RIOT,abp719/RIOT,openkosmosorg/RIOT,Hyungsin/RIOT-OS,Darredevil/RIOT,MonsterCode8000/RIOT,dkm/RIOT,ThanhVic/RIOT,robixnai/RIOT,ntrtrung/RIOT,toonst/RIOT,jasonatran/RIOT,JensErdmann/RIOT,mziegert/RIOT,Yonezawa-T2/RIOT,attdona/RIOT,mziegert/RIOT,cladmi/RIOT,rajma996/RIOT,msolters/RIOT,herrfz/RIOT,thiagohd/RIOT,Osblouf/RIOT,TobiasFredersdorf/RIOT,adrianghc/RIOT,BytesGalore/RIOT,alignan/RIOT,gebart/RIOT,mtausig/RIOT,asanka-code/RIOT,haoyangyu/RIOT,josephnoir/RIOT,ntrtrung/RIOT,MarkXYang/RIOT,RIOT-OS/RIOT,backenklee/RIOT,basilfx/RIOT,thiagohd/RIOT,alex1818/RIOT,adjih/RIOT,rajma996/RIOT,beurdouche/RIOT,luciotorre/RIOT,biboc/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,automote/RIOT,dhruvvyas90/RIOT,rousselk/RIOT,abp719/RIOT,LudwigOrtmann/RIOT,hamilton-mote/RIOT-OS,attdona/RIOT,lebrush/RIOT,gautric/RIOT,plushvoxel/RIOT,msolters/RIOT,syin2/RIOT,avmelnikoff/RIOT,RubikonAlpha/RIOT,openkosmosorg/RIOT,luciotorre/RIOT,thomaseichinger/RIOT,thomaseichinger/RIOT,jasonatran/RIOT,bartfaizoltan/RIOT,ant9000/RIOT,LudwigOrtmann/RIOT,adjih/RIOT,roberthartung/RIOT,asanka-code/RIOT,altairpearl/RIOT,rajma996/RIOT,adjih/RIOT,openkosmosorg/RIOT,openkosmosorg/RIOT,immesys/RiSyn,Darredevil/RIOT,katezilla/RIOT,latsku/RIOT,immesys/RiSyn,lebrush/RIOT,automote/RIOT,Osblouf/RIOT,katezilla/RIOT,dhruvvyas90/RIOT,gautric/RIOT,thiagohd/RIOT,l3nko/RIOT,gautric/RIOT,avmelnikoff/RIOT,msolters/RIOT,neumodisch/RIOT,neumodisch/RIOT,automote/RIOT,tfar/RIOT,basilfx/RIOT,x3ro/RIOT,watr-li/RIOT,binarylemon/RIOT,RBartz/RIOT,wentaoshang/RIOT,herrfz/RIOT,neiljay/RIOT,josephnoir/RIOT,watr-li/RIOT,tfar/RIOT,yogo1212/RIOT,brettswann/RIOT,backenklee/RIOT,jbeyerstedt/RIOT-OTA-update,kerneltask/RIOT,FrancescoErmini/RIOT,smlng/RIOT,attdona/RIOT,robixnai/RIOT,immesys/RiSyn,stevenj/RIOT,bartfaizoltan/RIOT,rfuentess/RIOT,haoyangyu/RIOT,kerneltask/RIOT,mtausig/RIOT,kb2ma/RIOT,kb2ma/RIOT,lebrush/RIOT,stevenj/RIOT,lebrush/RIOT,khhhh/RIOT,josephnoir/RIOT,rakendrathapa/RIOT,watr-li/RIOT,l3nko/RIOT,basilfx/RIOT,patkan/RIOT,TobiasFredersdorf/RIOT,A-Paul/RIOT,Josar/RIOT,asanka-code/RIOT,jbeyerstedt/RIOT-OTA-update