Merge pull request #2817 from jaapmarcus/fix/unable-install-sieve

Force creating /etc/dovecot/sieve

install/upgrade/manual/install_sieve.sh

@@ -57,7 +57,7 @@ if [ "$HAS_DOVECOT_SIEVE_INSTALLED" = "0" ]; then
     cp -f $HESTIA_COMMON_DIR/dovecot/sieve/* /etc/dovecot/conf.d
     
     # dovecot default file install
-    mkdir /etc/dovecot/sieve
+    mkdir -p /etc/dovecot/sieve
     echo -e "require [\"fileinto\"];\n# rule:[SPAM]\nif header :contains \"X-Spam-Flag\" \"YES\" {\n    fileinto \"INBOX.Spam\";\n}\n" > /etc/dovecot/sieve/default
     
     # exim4 install