We use `dpkg` 1.19.2 since 23661254e4.
This version dropped pkg_db_reset` in `<dpkg/dpkg_db.h>` which broke compilation with the
following errors:
```
/build/source/osquery/tables/system/linux/deb_packages.cpp: In function 'void osquery::tables::dpkg_setup(pkg_array*)':
/build/source/osquery/tables/system/linux/deb_packages.cpp:83:3: error: 'pkg_array_init_from_db' was not declared in this scope
pkg_array_init_from_db(packages);
^~~~~~~~~~~~~~~~~~~~~~
/build/source/osquery/tables/system/linux/deb_packages.cpp:83:3: note: suggested alternative: 'pkg_array_init_from_hash'
pkg_array_init_from_db(packages);
^~~~~~~~~~~~~~~~~~~~~~
pkg_array_init_from_hash
/build/source/osquery/tables/system/linux/deb_packages.cpp: In function 'void osquery::tables::dpkg_teardown(pkg_array*)':
/build/source/osquery/tables/system/linux/deb_packages.cpp:93:3: error: 'pkg_db_reset' was not declared in this scope
pkg_db_reset();
^~~~~~~~~~~~
/build/source/osquery/tables/system/linux/deb_packages.cpp:93:3: note: suggested alternative: 'pkg_hash_reset'
pkg_db_reset();
^~~~~~~~~~~~
pkg_hash_reset
make[2]: *** [osquery/tables/CMakeFiles/osquery_system_tables.dir/build.make:115: osquery/tables/CMakeFiles/osquery_system_tables.dir/system/linux/deb_packages.cpp.o] Error 1
```
As there's currently no upstream fix, it's better to use an older
version of `dpkg` for now.
The build missed `openssl` as input and failed with an error like this:
```
/nix/store/7n1h80xkbjhcijzp0iylk0nc7w05vy8k-net-snmp-5.8/include/net-snmp/library/scapi.h:14:10: fatal error: openssl/ossl_typ.h: No such file or directory
#include <openssl/ossl_typ.h> /* EVP_MD */
^~~~~~~~~~~~~~~~~~~~
compilation terminated.
```
This also unbreaks `osquery` (https://hydra.nixos.org/build/88547811).
See also https://hydra.nixos.org/build/88562937
Post-Installation scripts are running `update-desktop-database -q`
creating these files which obviously results in a lot of collisions.
Much better solution than eventually noticing their existence and
removing them in postInstall.
system-sendmail allows all sendmail's to be auto-detected, including on
non-NixOS systems. This is, to me, a better UX than having to manually
override the sendmailPath argument.
In exchange, it is a breach of retro-compatibility. Given right now I
can't see any uses for sendmailPath other than what is supported by
system-sendmail, I didn't keep it, but it'd be possible to allow
sendmailPath to override the choice of sendmail from system-sendmail.
