Shorthand for installing symlinks for depends scripts
fetch-verify can now handle URL chksums and Apache dyn/closer.cgi URLs
set -eu by default for depends scripts
Improved fetch-verify to handle multiple checksums

Useful when the checksum URL contains entries for prefixed/postfixed
filenames.
Shell template enumerates all subcommands from PATH
Suppressed noise from most-recently-modified-files

when symlinks points to non-existent paths
fetch-verify reversed the order of URL and File
Merged two DEPENDS_PREFIX symlink installer