pmwebd: fix thread safety issues in many PMAPI string calls
pmwebd: fix thread safety issues in many PMAPI string calls

adfernandes/pcp,aeg-aeg/pcpfans,aeg-aeg/pcpfans,wuliming/pcp,tjanez/pcp,adfernandes/pcp,wuliming/pcp,aeg-aeg/pcpfans,wuliming/pcp,edwardt/pcp,tjanez/pcp,wuliming/pcp,edwardt/pcp,aeg-aeg/pcpfans,adfernandes/pcp,adfernandes/pcp,tjanez/pcp,edwardt/pcp,adfernandes/pcp,edwardt/pcp,aeg-aeg/pcpfans,edwardt/pcp,tjanez/pcp,tjanez/pcp,edwardt/pcp,tjanez/pcp,wuliming/pcp,aeg-aeg/pcpfans,adfernandes/pcp,tjanez/pcp,aeg-aeg/pcpfans,adfernandes/pcp,edwardt/pcp,edwardt/pcp,adfernandes/pcp,wuliming/pcp,wuliming/pcp,aeg-aeg/pcpfans,tjanez/pcp,wuliming/pcp