mkosi: Remove usage of deprecated option names/sections

docs/HACKING.md

@@ -66,7 +66,7 @@ reuse the host's package cache. To do this, create a mkosi override file in
 mkosi.default.d/ (e.g 20-local.conf) and add the following contents:
 
 ```
-[Packages]
+[Content]
 Cache=<full-path-to-package-manager-cache> # (e.g. /var/cache/dnf)
 ```
 
@@ -229,7 +229,7 @@ mkosi's config. The easiest way to set the option is to create a file 20-local.c
 add the following contents:
 
 ```
-[Packages]
+[Content]
 IncludeDirectory=mkosi.includedir
 ```
 
@@ -238,7 +238,7 @@ We already configured clangd to map any paths in /usr/include in the build image
 host in the mkosi-clangd.sh script.
 
 We also need to make sure clangd is installed in the build image. To have mkosi install clangd in the build
-image, edit the 20-local.conf file we created earlier and add the following contents under the `[Packages]`
+image, edit the 20-local.conf file we created earlier and add the following contents under the `[Content]`
 section:
 
 ```

mkosi.default.d/10-systemd.conf

@@ -9,7 +9,7 @@ HostonlyInitrd=yes
 # Prevent ASAN warnings when building the image
 Environment=ASAN_OPTIONS=verify_asan_link_order=false
 
-[Packages]
+[Content]
 BuildDirectory=mkosi.builddir
 Cache=mkosi.cache
 InstallDirectory=mkosi.installdir
@@ -17,7 +17,7 @@ SourceFileTransferFinal=copy-git-others
 
 [Host]
 QemuHeadless=yes
-NetworkVeth=yes
+Netdev=yes
 QemuMem=2G
 
 [Validation]

mkosi.default.d/arch/10-mkosi.arch

@@ -8,7 +8,7 @@
 [Distribution]
 Distribution=arch
 
-[Packages]
+[Content]
 BuildPackages=
         acl
         bzip2

mkosi.default.d/centos_epel/10-mkosi.centos_epel

@@ -10,7 +10,7 @@ Distribution=centos_epel
 Format=gpt_xfs
 HostonlyInitrd=no
 
-[Packages]
+[Content]
 BuildPackages=
         diffutils
         docbook-style-xsl

mkosi.default.d/debian/10-mkosi.debian

@@ -7,7 +7,7 @@
 Distribution=debian
 Release=testing
 
-[Packages]
+[Content]
 BuildPackages=
         acl
         clang

mkosi.default.d/fedora/10-mkosi.fedora

@@ -7,7 +7,7 @@
 Distribution=fedora
 Release=36
 
-[Packages]
+[Content]
 BuildPackages=
         diffutils
         docbook-style-xsl

mkosi.default.d/opensuse/10-mkosi.opensuse

@@ -7,7 +7,7 @@
 Distribution=opensuse
 Release=tumbleweed
 
-[Packages]
+[Content]
 BuildPackages=
         docbook-xsl-stylesheets
         fdupes

mkosi.default.d/ubuntu/10-mkosi.ubuntu

@@ -8,7 +8,7 @@ Distribution=ubuntu
 Release=jammy
 Repositories=main,universe
 
-[Packages]
+[Content]
 BuildPackages=
         acl
         docbook-xml

test/mkosi.default.networkd-test

@@ -21,7 +21,7 @@ Output=networkd-test.raw
 [Partitions]
 RootSize=3G
 
-[Packages]
+[Content]
 BuildPackages=
         audit-libs-devel
         bzip2-devel