do not schedule repeated jobs in the past; fixes #472
do not schedule repeated jobs in the past; fixes #472

StalderT/open62541,bostjanv/open62541,AGIsmail/open62541,jpfr/open62541,open62541/open62541,jpfr/open62541,StalderT/open62541,open62541/open62541,open62541/open62541,AGIsmail/open62541,StalderT/open62541,JGrothoff/open62541,jpfr/open62541,bostjanv/open62541,JGrothoff/open62541,jpfr/open62541,JGrothoff/open62541,JGrothoff/open62541,StalderT/open62541,open62541/open62541