man/man3/pmregisterderived.3: document defined(x)
man/man3/pmregisterderived.3: document defined(x)

adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp