tls: typos a/an

src/modules/tls/doc/hsm_howto.xml

@@ -32,7 +32,7 @@ modparam("tls", "engine_config", "/usr/local/etc/kamailio/thales.cnf")
 modparam("tls", "engine_algorithms", "EC")
 ...
 
-/usr/local/etc/kamailio/thales.cnf is a OpenSSL config format file used to
+/usr/local/etc/kamailio/thales.cnf is an OpenSSL config format file used to
 bootstrap the engine, e.g., pass the PIN.
 
 ...

src/modules/tls/doc/params.xml

@@ -1340,7 +1340,7 @@ modparam("tls", "engine_algorithms", "ALL")
 	<section id="tls.p.engine_config">
 	<title><varname>engine_config</varname> (string)</title>
 	<para>
-	        A OpenSSL configuration file to initialize the engine. Typically used to send PIN to HSMs to unlock
+	        An OpenSSL configuration file to initialize the engine. Typically used to send PIN to HSMs to unlock
 	        private keys. See the HSM howto for an example. This global param is not supported in the tls config file.
 	</para>
         </section>

src/modules/tls/doc/tls.xml

@@ -133,7 +133,7 @@ request_route {
 		<para>
 			For OpenSSL (libssl) v1.1.x, it is required to preload
 			'openssl_mutex_shared' library shipped by &kamailio;. For more details
-			see 'src/modules/tls/openssl_mutex_shared/README.md'.
+			see 'src/modules/tls/utils/openssl_mutex_shared/README.md'.
 		</para>
 		<para>
 			This module includes several workarounds for various Openssl bugs