Handle '\n' line breaks in PEM-encoded SSL/TLS certificates

For example Podman, handling OCI containers, does not seem to have
a way to pass multi-line strings via env files (and Docker seems to
have the same issue at least outside of docker-compose). Thus this
change allows 'LDAP_CA_CERT' to handle a string with '\n', because
currently only 0x0A aka LF might work. An example for additionally
supported format:

LDAP_CA_CERT=-----BEGIN CERTIFICATE-----\n...\n...\n...\n-----END CERTIFICATE-----

See also: https://github.com/wekan/wekan/issues/3484

packages/wekan-ldap/server/ldap.js

@@ -100,7 +100,7 @@ export default class LDAP {
 
     if (this.options.ca_cert && this.options.ca_cert !== '') {
       // Split CA cert into array of strings
-      const chainLines = this.constructor.settings_get('LDAP_CA_CERT').split('\n');
+      const chainLines = this.constructor.settings_get('LDAP_CA_CERT').replace(/\\n/g,'\n').split('\n');
       let cert         = [];
       const ca         = [];
       chainLines.forEach((line) => {