modules/freifunk: silence grep errors if /etc/crontabs/root does not exist
modules/freifunk: silence grep errors if /etc/crontabs/root does not exist


git-svn-id: f7818b41aa164576329f806d7c3827e8a55298bb@4463 ab181a69-ba2e-0410-a84d-ff88ab4c47bc

eugenesan/openwrt-luci,jschmidlapp/luci,Flexibity/luci,freifunk-gluon/luci,saraedum/luci-packages-old,yeewang/openwrt-luci,vhpham80/luci,freifunk-gluon/luci,dtaht/cerowrt-luci-3.3,ThingMesh/openwrt-luci,zwhfly/openwrt-luci,dtaht/cerowrt-luci-3.3,Canaan-Creative/luci,stephank/luci,zwhfly/openwrt-luci,jschmidlapp/luci,eugenesan/openwrt-luci,Flexibity/luci,alxhh/piratenluci,yeewang/openwrt-luci,Canaan-Creative/luci,zwhfly/openwrt-luci,ch3n2k/luci,ThingMesh/openwrt-luci,ThingMesh/openwrt-luci,yeewang/openwrt-luci,saraedum/luci-packages-old,vhpham80/luci,zwhfly/openwrt-luci,freifunk-gluon/luci,alxhh/piratenluci,phi-psi/luci,ReclaimYourPrivacy/cloak-luci,stephank/luci,dtaht/cerowrt-luci-3.3,jschmidlapp/luci,phi-psi/luci,ThingMesh/openwrt-luci,stephank/luci,yeewang/openwrt-luci,8devices/carambola2-luci,ReclaimYourPrivacy/cloak-luci,ch3n2k/luci,Canaan-Creative/luci,jschmidlapp/luci,projectbismark/luci-bismark,phi-psi/luci,8devices/carambola2-luci,projectbismark/luci-bismark,freifunk-gluon/luci,stephank/luci,gwlim/luci,projectbismark/luci-bismark,stephank/luci,projectbismark/luci-bismark,8devices/carambola2-luci,ch3n2k/luci,zwhfly/openwrt-luci,zwhfly/openwrt-luci,gwlim/luci,Canaan-Creative/luci,freifunk-gluon/luci,alxhh/piratenluci,projectbismark/luci-bismark,ReclaimYourPrivacy/cloak-luci,phi-psi/luci,yeewang/openwrt-luci,saraedum/luci-packages-old,jschmidlapp/luci,8devices/carambola2-luci,ch3n2k/luci,dtaht/cerowrt-luci-3.3,ReclaimYourPrivacy/cloak-luci,alxhh/piratenluci,saraedum/luci-packages-old,gwlim/luci,vhpham80/luci,ch3n2k/luci,Flexibity/luci,zwhfly/openwrt-luci,projectbismark/luci-bismark,jschmidlapp/luci,eugenesan/openwrt-luci,saraedum/luci-packages-old,zwhfly/openwrt-luci,gwlim/luci,8devices/carambola2-luci,eugenesan/openwrt-luci,freifunk-gluon/luci,alxhh/piratenluci,saraedum/luci-packages-old,Flexibity/luci,projectbismark/luci-bismark,ReclaimYourPrivacy/cloak-luci,phi-psi/luci,jschmidlapp/luci,jschmidlapp/luci,eugenesan/openwrt-luci,dtaht/cerowrt-luci-3.3,eugenesan/openwrt-luci,Flexibity/luci,8devices/carambola2-luci,Canaan-Creative/luci,phi-psi/luci,vhpham80/luci,Flexibity/luci,alxhh/piratenluci,gwlim/luci,vhpham80/luci,ReclaimYourPrivacy/cloak-luci,ReclaimYourPrivacy/cloak-luci,Flexibity/luci,ThingMesh/openwrt-luci,8devices/carambola2-luci,Flexibity/luci,Canaan-Creative/luci,ch3n2k/luci,freifunk-gluon/luci,dtaht/cerowrt-luci-3.3,zwhfly/openwrt-luci,Canaan-Creative/luci,yeewang/openwrt-luci,ReclaimYourPrivacy/cloak-luci,yeewang/openwrt-luci,stephank/luci,ch3n2k/luci,phi-psi/luci,freifunk-gluon/luci,eugenesan/openwrt-luci,Canaan-Creative/luci,ThingMesh/openwrt-luci,gwlim/luci,alxhh/piratenluci,saraedum/luci-packages-old,projectbismark/luci-bismark,vhpham80/luci,gwlim/luci,ThingMesh/openwrt-luci