pam: extend changelog

Author: pbiering

CHANGELOG.md

@@ -6,6 +6,7 @@
 * Fix: catch OS errors on PUT MKCOL MKCALENDAR MOVE PROPPATCH (insufficient storage, access denied, internal server error)
 * Test: skip bcrypt related tests if module is missing
 * Improve: relax mtime check on storage filesystem, change test file location to "collection-root" directory
+* Add: option [auth] type pam by code migration from v1, add new option pam_serivce
 
 ## 3.4.1
 * Add: option [auth] dovecot_connection_type / dovecot_host / dovecot_port