examples/gcoap: fix post/put without port number
examples/gcoap: fix post/put without port number

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