The permissions of /usr/doc/dhcpcd-0.70 from the RH5.2 package dhcpcd-0.70-2 are -rw-r--r--, but I think they should be -rwxr-xr-x like the rest of the directories under /usr/doc.
I have verified this to be a bug. The directory /usr/doc/dhcpcd-0.70 has incorrect permissions. It is currently being installed as 644 and needs to be 755.
jbj fixed this in dhcpcd-0.70-3 (currently in rawhide)