meson: reorder the "features" list

Try to make this more manageable by reording:
- dependencies / inputs
  (with subcategory of compression libraries)
- major components / outputs
- optional features / conditionals that don't fit into the two above categories

The division isn't well defined, because libraries often correspond one-to-one
to feature, but not always.

meson.build

@@ -3746,92 +3746,101 @@ found = []
 missing = []
 
 foreach tuple : [
-        ['libcryptsetup'],
-        ['PAM'],
-        ['pwquality'],
-        ['libfdisk'],
-        ['p11kit'],
-        ['libfido2'],
-        ['tpm2'],
+        # dependencies
+        ['ACL'],
         ['AUDIT'],
-        ['IMA'],
         ['AppArmor'],
-        ['SELinux'],
+        ['IMA'],
+        ['PAM'],
         ['SECCOMP'],
+        ['SELinux'],
         ['SMACK'],
-        ['zlib'],
-        ['xz'],
+        ['blkid'],
+        ['elfutils'],
+        ['gcrypt'],
+        ['gnutls'],
+        ['libcryptsetup'],
+        ['libcurl'],
+        ['libfdisk'],
+        ['libfido2'],
+        ['libidn'],
+        ['libidn2'],
+        ['libiptc'],
+        ['microhttpd'],
+        ['openssl'],
+        ['p11kit'],
+        ['pcre2'],
+        ['pwquality'],
+        ['qrencode'],
+        ['tpm2'],
+        ['xkbcommon'],
+
+        # compression libs
         ['zstd'],
         ['lz4'],
+        ['xz'],
+        ['zlib'],
         ['bzip2'],
-        ['ACL'],
-        ['gcrypt'],
-        ['qrencode'],
-        ['microhttpd'],
-        ['gnutls'],
-        ['openssl'],
-        ['libcurl'],
-        ['idn'],
-        ['initrd'],
-        ['compat-mutable-uid-boundaries'],
-        ['nscd'],
-        ['libidn2'],
-        ['libidn'],
-        ['libiptc'],
-        ['elfutils'],
-        ['binfmt'],
-        ['repart'],
-        ['vconsole'],
-        ['quotacheck'],
-        ['tmpfiles'],
-        ['environment.d'],
-        ['sysusers'],
-        ['firstboot'],
-        ['randomseed'],
+
+        # components
         ['backlight'],
-        ['rfkill'],
-        ['xdg-autostart'],
-        ['logind'],
-        ['machined'],
-        ['portabled'],
-        ['sysext'],
-        ['userdb'],
-        ['homed'],
-        ['importd'],
-        ['hostnamed'],
-        ['timedated'],
-        ['timesyncd'],
-        ['localed'],
-        ['networkd'],
-        ['resolve'],
-        ['DNS-over-TLS(gnutls)',  conf.get('DNS_OVER_TLS_USE_GNUTLS') == 1],
-        ['DNS-over-TLS(openssl)', conf.get('DNS_OVER_TLS_USE_OPENSSL') == 1],
+        ['binfmt'],
         ['coredump'],
-        ['pstore'],
-        ['oomd'],
-        ['polkit'],
-        ['legacy pkla',           install_polkit_pkla],
+        ['environment.d'],
         ['efi'],
         ['gnu-efi',               have_gnu_efi],
-        ['kmod'],
-        ['xkbcommon'],
-        ['pcre2'],
-        ['blkid'],
-        ['dbus'],
-        ['glib'],
+        ['firstboot'],
+        ['hibernate'],
+        ['homed'],
+        ['hostnamed'],
+        ['hwdb'],
+        ['importd'],
+        ['initrd'],
+        ['kernel-install',        get_option('kernel-install')],
+        ['localed'],
+        ['logind'],
+        ['machined'],
+        ['networkd'],
         ['nss-myhostname'],
         ['nss-mymachines'],
         ['nss-resolve'],
         ['nss-systemd'],
-        ['hwdb'],
+        ['oomd'],
+        ['portabled'],
+        ['pstore'],
+        ['quotacheck'],
+        ['randomseed'],
+        ['repart'],
+        ['resolve'],
+        ['rfkill'],
+        ['sysext'],
+        ['systemd-analyze',       conf.get('ENABLE_ANALYZE') == 1],
+        ['sysusers'],
+        ['timedated'],
+        ['timesyncd'],
+        ['tmpfiles'],
+        ['userdb'],
+        ['vconsole'],
+        ['xdg-autostart'],
+
+        # optional features
+        ['DNS-over-TLS(gnutls)',  conf.get('DNS_OVER_TLS_USE_GNUTLS') == 1],
+        ['DNS-over-TLS(openssl)', conf.get('DNS_OVER_TLS_USE_OPENSSL') == 1],
+        ['idn'],
+        ['polkit'],
+        ['nscd'],
+        ['legacy-pkla',           install_polkit_pkla],
+        ['kmod'],
+        ['dbus'],
+        ['glib'],
         ['tpm'],
         ['man pages',             want_man],
         ['html pages',            want_html],
         ['man page indices',      want_man and have_lxml],
         ['SysV compat'],
+        ['compat-mutable-uid-boundaries'],
         ['utmp'],
         ['ldconfig'],
-        ['hibernate'],
         ['adm group',             get_option('adm-group')],
         ['wheel group',           get_option('wheel-group')],
         ['gshadow'],
@@ -3845,8 +3854,6 @@ foreach tuple : [
         ['link-systemctl-shared', get_option('link-systemctl-shared')],
         ['link-networkd-shared',  get_option('link-networkd-shared')],
         ['link-timesyncd-shared', get_option('link-timesyncd-shared')],
-        ['kernel-install',        get_option('kernel-install')],
-        ['systemd-analyze',       conf.get('ENABLE_ANALYZE') == 1],
         ['fexecve'],
         ['standalone-binaries',   get_option('standalone-binaries')],
 ]