convert ntpq "when" output to second when necessary
convert ntpq "when" output to second when necessary

ntpq program can produce pretty value for "when" when last packet
arrived for a long time, such as Xm (for X minutes), Xh (for X hours),
Xd (for X days). This commit converts all that pretty outputs to seconds as
diamond needs values to be float numbers.

CYBERBUGJR/Diamond,mfriedenhagen/Diamond,tellapart/Diamond,sebbrandt87/Diamond,acquia/Diamond,zoidbergwill/Diamond,Netuitive/netuitive-diamond,Slach/Diamond,MichaelDoyle/Diamond,anandbhoraskar/Diamond,hamelg/Diamond,janisz/Diamond-1,EzyInsights/Diamond,CYBERBUGJR/Diamond,hvnsweeting/Diamond,bmhatfield/Diamond,Basis/Diamond,gg7/diamond,janisz/Diamond-1,zoidbergwill/Diamond,CYBERBUGJR/Diamond,signalfx/Diamond,tusharmakkar08/Diamond,Ssawa/Diamond,EzyInsights/Diamond,saucelabs/Diamond,TAKEALOT/Diamond,Nihn/Diamond-1,Clever/Diamond,Precis/Diamond,codepython/Diamond,sebbrandt87/Diamond,codepython/Diamond,mzupan/Diamond,ramjothikumar/Diamond,signalfx/Diamond,Precis/Diamond,disqus/Diamond,gg7/diamond,tuenti/Diamond,eMerzh/Diamond-1,stuartbfox/Diamond,tuenti/Diamond,Clever/Diamond,jriguera/Diamond,TinLe/Diamond,python-diamond/Diamond,cannium/Diamond,ceph/Diamond,Ssawa/Diamond,signalfx/Diamond,tellapart/Diamond,Netuitive/Diamond,cannium/Diamond,eMerzh/Diamond-1,Clever/Diamond,jaingaurav/Diamond,russss/Diamond,Ssawa/Diamond,janisz/Diamond-1,acquia/Diamond,joel-airspring/Diamond,gg7/diamond,Basis/Diamond,zoidbergwill/Diamond,mfriedenhagen/Diamond,hvnsweeting/Diamond,hamelg/Diamond,sebbrandt87/Diamond,tusharmakkar08/Diamond,TAKEALOT/Diamond,acquia/Diamond,ramjothikumar/Diamond,h00dy/Diamond,timchenxiaoyu/Diamond,hvnsweeting/Diamond,h00dy/Diamond,Netuitive/Diamond,szibis/Diamond,jaingaurav/Diamond,timchenxiaoyu/Diamond,dcsquared13/Diamond,Netuitive/Diamond,tellapart/Diamond,thardie/Diamond,janisz/Diamond-1,tuenti/Diamond,jaingaurav/Diamond,ceph/Diamond,works-mobile/Diamond,szibis/Diamond,jriguera/Diamond,works-mobile/Diamond,Netuitive/Diamond,Ormod/Diamond,python-diamond/Diamond,mfriedenhagen/Diamond,Ormod/Diamond,anandbhoraskar/Diamond,works-mobile/Diamond,python-diamond/Diamond,mfriedenhagen/Diamond,saucelabs/Diamond,Clever/Diamond,jumping/Diamond,ceph/Diamond,mzupan/Diamond,Precis/Diamond,eMerzh/Diamond-1,signalfx/Diamond,Precis/Diamond,russss/Diamond,krbaker/Diamond,cannium/Diamond,rtoma/Diamond,TAKEALOT/Diamond,zoidbergwill/Diamond,jumping/Diamond,krbaker/Diamond,disqus/Diamond,jriguera/Diamond,EzyInsights/Diamond,Ensighten/Diamond,mzupan/Diamond,szibis/Diamond,dcsquared13/Diamond,skbkontur/Diamond,timchenxiaoyu/Diamond,actmd/Diamond,saucelabs/Diamond,skbkontur/Diamond,eMerzh/Diamond-1,joel-airspring/Diamond,ramjothikumar/Diamond,Nihn/Diamond-1,russss/Diamond,disqus/Diamond,skbkontur/Diamond,bmhatfield/Diamond,Ensighten/Diamond,Ormod/Diamond,codepython/Diamond,acquia/Diamond,russss/Diamond,MichaelDoyle/Diamond,TinLe/Diamond,TinLe/Diamond,skbkontur/Diamond,sebbrandt87/Diamond,actmd/Diamond,jumping/Diamond,h00dy/Diamond,rtoma/Diamond,Netuitive/netuitive-diamond,ramjothikumar/Diamond,thardie/Diamond,bmhatfield/Diamond,socialwareinc/Diamond,socialwareinc/Diamond,Slach/Diamond,joel-airspring/Diamond,Nihn/Diamond-1,tusharmakkar08/Diamond,krbaker/Diamond,anandbhoraskar/Diamond,CYBERBUGJR/Diamond,codepython/Diamond,tellapart/Diamond,Slach/Diamond,hamelg/Diamond,h00dy/Diamond,Ormod/Diamond,rtoma/Diamond,socialwareinc/Diamond,hamelg/Diamond,TinLe/Diamond,rtoma/Diamond,tuenti/Diamond,szibis/Diamond,cannium/Diamond,TAKEALOT/Diamond,actmd/Diamond,timchenxiaoyu/Diamond,tusharmakkar08/Diamond,thardie/Diamond,EzyInsights/Diamond,thardie/Diamond,joel-airspring/Diamond,Ensighten/Diamond,Ensighten/Diamond,ceph/Diamond,stuartbfox/Diamond,anandbhoraskar/Diamond,stuartbfox/Diamond,Ssawa/Diamond,jriguera/Diamond,Nihn/Diamond-1,socialwareinc/Diamond,actmd/Diamond,Slach/Diamond,bmhatfield/Diamond,works-mobile/Diamond,jumping/Diamond,jaingaurav/Diamond,gg7/diamond,saucelabs/Diamond,Basis/Diamond,hvnsweeting/Diamond,krbaker/Diamond,stuartbfox/Diamond,Basis/Diamond,MichaelDoyle/Diamond,MichaelDoyle/Diamond,Netuitive/netuitive-diamond,mzupan/Diamond,dcsquared13/Diamond,dcsquared13/Diamond,Netuitive/netuitive-diamond