bug 887052 - rename nsIStrictTransportSecurityService to nsISiteSecurityService for refactoring r=cviecco r=mcmanus r=jst sr=jst

--HG--
rename : netwerk/base/public/nsIStrictTransportSecurityService.idl => netwerk/base/public/nsISiteSecurityService.idl
rename : security/manager/boot/src/nsStrictTransportSecurityService.cpp => security/manager/boot/src/nsSiteSecurityService.cpp
rename : security/manager/boot/src/nsStrictTransportSecurityService.h => security/manager/boot/src/nsSiteSecurityService.h
bug 887052 - refactor nsISiteSecurityService for multiple headers r=cviecco r=mcmanus r=jst sr=jst