Merge r4899 r4900 r4901 r4902 r4903 into 5.41-7.0 drivedb.h branches.

Sign 5.41-6.6 drivedb.h using new key ID 721042C5.


git-svn-id: https://svn.code.sf.net/p/smartmontools/code/branches/RELEASE_5_41_DRIVEDB@4904 4ea69e1a-61f1-4043-bf83-b5c94c648137