- remove libeditline dependency again as libeditline lives in /usr

- update to version 0.5.7
- optimize dash -c "command" to avoid a fork
- improve LINENO support
- dotcmd should exit with zero when doing nothing
- replace GPL noclobberopen code with the FreeBSD version
- do not split the result of tilde expansion
- use exit status 127 when the script to run does not exist
- document optional open parenthesis for case patterns
- use faccessat if available
- added dash-0.5.7-do-not-close-stderr.patch in order to prevent
stderr from being closed when /dev/tty fails to open (backported
from upstream git)
- added
dash-remove-backslash-before-in-double-quotes-in-variable.patch
which removes a backslash before } in double-quotes in variable
as it prevents the closing brace from terminating the
substitution (from FreeBSD/Debian)

- Remove redundant tags/sections from specfile
(cf. packaging guidelines)