Fix some issues reported by lintian

Fix some issues reported by lintian

• Use set -e rather than passing -e on the shebang-line. (maintainer-script-without-set-e)

• Update standards version to 4.6.1, no changes needed. (out-of-date-standards-version)

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Build and test logs for this branch can be found at https://janitor.debian.net/lintian-fixes/pkg/bsdgames-nonfree/7e60a5ec-3c44-47d4-ae85-1007e5224417.

Debdiff

These changes affect the binary packages:

[The following lists of changes regard files as different if they have different names, permissions or owners.]

Files in second set of .debs but not in first

-rw-r--r--  root/root   /usr/lib/debug/.build-id/96/d6f56d78dce2b7353fa312421e89c19557459d.debug

Files in first set of .debs but not in second

-rw-r--r--  root/root   /usr/lib/debug/.build-id/a1/ee4d41bffe84b4b6e95b4e9636590f734bcc37.debug

Control files of package bsdgames-nonfree: lines which differ (wdiff format)

• Depends: libc6 (>= 2.33), 2.34), libncurses6 (>= 6), libtinfo6 (>= 6)

Control files of package bsdgames-nonfree-dbgsym: lines which differ (wdiff format)

• Build-Ids: a1ee4d41bffe84b4b6e95b4e9636590f734bcc37 96d6f56d78dce2b7353fa312421e89c19557459d

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