Add INSTALL kernel.  Fix .ub generation.
Consistency in commas. Wording.
Import dhcpcd-6.4.7 with the following change:
  *  Fix an impossible analyser error and correctly assign unset iaids.
Sync
Note import of dhcpcd-6.4.7
Introduce a separate bit mask for the return address. Use it on HPPA.
Fix synopsis, remove unneeded Pp macro before display block and add one
before prototype. While here, use "Rv -std" for RETURN VALUES.