Log Message:
tex-lettrine{,-doc}: update to 2.40

Changes:
- file "lettrine.ins" deleted, "lettrine.dtx" auto-generates
  "lettrine.sty" and "lettrine.cfg";
- packages "xkeyval" and "minifp" are no longer required, kernel
  packages "ltxkeys" and "xfp" are used instead.
- The second mandatory argument of \lettrine is now printed using
  \unhcopy instead of \usebox (allows microtype action and footnote calls).