rbuf: made `RBUF_INT_SIZE` configurable
rbuf: made `RBUF_INT_SIZE` configurable

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