ssl: Improve PEM cache by validating entries

The PEM cache is now validated by a background process, instead of
always keeping it if it is small enough and clearing it otherwhiss.
That strategy required that small caches where cleared by API function
if a file changes on disk.

However document the clearing API function as it can still be usefull.

1 files changed, 14 insertions, 2 deletions

diff --git a/lib/ssl/doc/src/ssl.xml b/lib/ssl/doc/src/ssl.xml
index 39b9b70579..249fee5760 100644
--- a/lib/ssl/doc/src/ssl.xml
+++ b/lib/ssl/doc/src/ssl.xml
@@ -163,7 +163,7 @@
       is supplied it will override the certfile option.</item>
       
       <tag>{certfile, path()}</tag>
-      <item>Path to a file containing the user's certificate.</item>
+      <item>Path to a file containing the user's PEM encoded certificate.</item>
       
       <tag>{key, {'RSAPrivateKey'| 'DSAPrivateKey' | 'ECPrivateKey' |'PrivateKeyInfo', der_encoded()}}</tag>
       <item> The DER encoded users private key. If this option
@@ -550,7 +550,19 @@ fun(srp, Username :: string(), UserState :: term()) ->
 	</p>
     </desc>
     </func>
-    
+
+    <func>
+      <name>clear_pem_cache() -> ok </name>
+      <fsummary> Clears the pem cache</fsummary>
+
+      <desc><p>PEM files, used by ssl API-functions, are cached. The
+      cache is regularly checked to see if any cache entries should be
+      invalidated, however this function provides a way to
+      unconditionally clear the whole cache.
+      </p>
+      </desc>
+    </func>
+   
     <func>
       <name>connect(Socket, SslOptions) -> </name>
       <name>connect(Socket, SslOptions, Timeout) -> {ok, SslSocket}