filezilla: update build to latest version of sqlite
filezilla: cosmetic changes to meta section
filezilla: strip trailing whitespace
sqlite: clean up

 - Add version 3.7.14.1 again, so that we can work around issues caused
   by the recent 3.7.16.1 update.

 - Drop obsolete version 3.6.x.

 - Consistently use the sqlite version number to name the file of the
   expression.