sc_ipv6_nc: Use more letters for type
sc_ipv6_nc: Use more letters for type

I was myself a little confused when I saw `R` for a registered address,
since I interpreted it as "router" (though the node wasn't supposed to
be a router). After a wild goose chase for wrongly set flags through the
code I found that `R` stands for "REGISTERED". To prevent such a thing
in the future I opted for fixing this in the output.

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