SyndicationFormat.cc: Fix more potential signal 11 if strptime is given, also added strptime logic to Atom format
SyndicationFormat.cc: Fix more potential signal 11 if strptime is given, also added strptime logic to Atom format

ubtue/ub_tools,ubtue/ub_tools,ubtue/ub_tools,ubtue/ub_tools,ubtue/ub_tools,ubtue/ub_tools,ubtue/ub_tools,ubtue/ub_tools