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22.19 Version 3.9.2
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Released April, 2011.

*

     Multiple clarifications throughout Policy where “installed” was
     used and the more precise terms “unpacked” or “configured” were
     intended.

3.3

     The maintainer address must accept mail from Debian role accounts
     and the BTS. At least one human must be listed with their personal
     email address in ‘Uploaders’ if the maintainer is a shared email
     address.  The duties of a maintainer are also clearer.

5

     All control fields are now classified as simple, folded, or
     multiline, which governs whether their values must be a single line
     or may be continued across multiple lines and whether line breaks
     are significant.

5.1

     Parsers are allowed to accept paragraph separation lines containing
     whitespace, but control files should use completely empty lines.
     Ordering of paragraphs is significant.  Field names must be
     composed of printable ASCII characters except colon and must not
     begin with #.

5.6.25

     The ‘DM-Upload-Allowed’ field is now documented.

6.5

     The system state maintainer scripts can rely upon during each
     possible invocation is now documented.  In several less-common
     cases, this is stricter than Policy had previously documented.
     Packages with complex maintainer scripts should be reviewed in
     light of this new documentation.

7.2

     The impact on system state when maintainer scripts that are part of
     a circular dependency are run is now documented.  Circular
     dependencies are now a should not.

7.2

     The system state when ‘postinst’ and ‘prerm’ scripts are run is now
     documented, and the documentation of the special case of dependency
     state for ‘postrm’ scripts has been improved.  ‘postrm’ scripts are
     required to gracefully skip actions if their dependencies are not
     available.

9.1.1

     GNU/Hurd systems are allowed ‘/hurd’ and ‘/servers’ directories in
     the root filesystem.

9.1.1

     Packages installing to architecture-specific subdirectories of
     ‘/usr/lib’ must use the value returned by ‘dpkg-architecture
     -qDEB_HOST_MULTIARCH’, not by ‘dpkg-architecture
     -qDEB_HOST_GNU_TYPE’; this is a path change on i386 architectures
     and a no-op for other architectures.

virtual

     ‘mailx’ is now a virtual package provided by packages that install
     ‘/usr/bin/mailx’ and implement at least the POSIX-required
     interface.