Release v3.17.4

This release make several bug fixes and implementation improvements as
listed below:

* Fix memory leak on subscription list
* Add missing --nosigcheck option to search subcommand
* Better memory management in some codepaths
* Report missing packs to telemetry (when user is opted-in)
* Unused/commented-out code removed from codebase
* Improve the internal swupd_curl API, including making it more usable
  and performing better memory management.
* Remove content when running swupd clean and only keep manifests around
* Add fullfile fallback to bundle-add code.
* Refactor bundle-remove to properly remove multiple bundles.

Signed-off-by: Matthew Johnson <[email protected]>

configure.ac

@@ -2,7 +2,7 @@
 # Process this file with autoconf to produce a configure script.
 
 AC_PREREQ([2.66])
-AC_INIT(swupd-client, 3.17.3, [email protected])
+AC_INIT(swupd-client, 3.17.4, [email protected])
 AM_PROG_AR
 LT_INIT
 AC_CONFIG_MACRO_DIR([m4])