update compression algorithms for dovecot 3.3.14

xz is deprecated; lz4 and zstd were not present in our configs before

core/dovecot/conf/dovecot.conf

@@ -50,7 +50,7 @@ plugin {
   fts_autoindex_exclude = \Trash
   {% endif %}
 
-  {% if COMPRESSION in [ 'gz', 'bz2', 'xz', 'lz4' ] %}
+  {% if COMPRESSION in [ 'gz', 'bz2', 'lz4', 'zstd' ] %}
   zlib_save = {{ COMPRESSION }}
   {% endif %}
 

setup/flavors/compose/mailu.env

@@ -86,7 +86,7 @@ WELCOME_SUBJECT={{ welcome_subject or 'Welcome to your new email account' }}
 WELCOME_BODY={{ welcome_body or 'Welcome to your new email account, if you can read this, then it is configured properly!' }}
 
 # Maildir Compression
-# choose compression-method, default: none (value: gz, bz2, xz, lz4)
+# choose compression-method, default: none (value: gz, bz2, lz4, zstd)
 COMPRESSION={{ compression }}
 # change compression-level, default: 6 (value: 1-9)
 COMPRESSION_LEVEL={{ compression_level }}

tests/compose/core/mailu.env

@@ -92,7 +92,7 @@ DMARC_RUF=admin
 
 
 # Maildir Compression
-# choose compression-method, default: none (value: gz, bz2, xz, lz4)
+# choose compression-method, default: none (value: gz, bz2, lz4, zstd)
 COMPRESSION=
 # change compression-level, default: 6 (value: 1-9)
 COMPRESSION_LEVEL=

tests/compose/fetchmail/mailu.env

@@ -92,7 +92,7 @@ DMARC_RUF=admin
 
 
 # Maildir Compression
-# choose compression-method, default: none (value: gz, bz2, xz, lz4)
+# choose compression-method, default: none (value: gz, bz2, lz4, zstd)
 COMPRESSION=
 # change compression-level, default: 6 (value: 1-9)
 COMPRESSION_LEVEL=

tests/compose/filters/mailu.env

@@ -92,7 +92,7 @@ DMARC_RUF=admin
 
 
 # Maildir Compression
-# choose compression-method, default: none (value: gz, bz2, xz, lz4)
+# choose compression-method, default: none (value: gz, bz2, lz4, zstd)
 COMPRESSION=
 # change compression-level, default: 6 (value: 1-9)
 COMPRESSION_LEVEL=

tests/compose/rainloop/mailu.env

@@ -92,7 +92,7 @@ DMARC_RUF=admin
 
 
 # Maildir Compression
-# choose compression-method, default: none (value: gz, bz2, xz, lz4)
+# choose compression-method, default: none (value: gz, bz2, lz4, zstd)
 COMPRESSION=
 # change compression-level, default: 6 (value: 1-9)
 COMPRESSION_LEVEL=

tests/compose/roundcube/mailu.env

@@ -92,7 +92,7 @@ DMARC_RUF=admin
 
 
 # Maildir Compression
-# choose compression-method, default: none (value: gz, bz2, xz, lz4)
+# choose compression-method, default: none (value: gz, bz2, lz4, zstd)
 COMPRESSION=
 # change compression-level, default: 6 (value: 1-9)
 COMPRESSION_LEVEL=

tests/compose/webdav/mailu.env

@@ -92,7 +92,7 @@ DMARC_RUF=admin
 
 
 # Maildir Compression
-# choose compression-method, default: none (value: gz, bz2, xz, lz4)
+# choose compression-method, default: none (value: gz, bz2, lz4, zstd)
 COMPRESSION=
 # change compression-level, default: 6 (value: 1-9)
 COMPRESSION_LEVEL=