MozNSS: ignore certdb 'sql:' prefix when testing existence of the directory

If the certdb uses newer SQL format, the certificate directory name starts with 'sql:'. This prefix has to be ignored
when testing certificate directory existence.

Author: Jan Vcelak <jvcelak@redhat.com>
Upstream ITS: #7388
Resolves: #857390

diff --git a/libraries/libldap/tls_m.c b/libraries/libldap/tls_m.c
index 61d71d4..80fa4f1 100644
--- a/libraries/libldap/tls_m.c
+++ b/libraries/libldap/tls_m.c
@@ -1643,7 +1643,13 @@ tlsm_get_certdb_prefix( const char *certdir, char **realcertdir, char **prefix )
 		return;
 	}
 
-	prc = PR_GetFileInfo( certdir, &prfi );
+	/* ignore sql: prefix if provided */
+	if ( strncmp( "sql:", certdir, 4 ) == 0 ) {
+		prc = PR_GetFileInfo( certdir + 4, &prfi );
+	} else {
+		prc = PR_GetFileInfo( certdir, &prfi );
+	}
+
 	/* if certdir exists (file or directory) then it cannot specify a prefix */
 	if ( prc == PR_SUCCESS ) {
 		return;
-- 
1.7.11.4