export RECOLL_CONFDIR to filters

src/utils/execmd.cpp

@@ -102,6 +102,13 @@ void  ExecCmd::putenv(const string &ea)
 {
     m_env.push_back(ea);
 }
+
+void  ExecCmd::putenv(const string &name, const string& value)
+{
+    string ea = name + "=" + value;
+    putenv(ea);
+}
+
 static void msleep(int millis)
 {
     struct timespec spec;

src/utils/execmd.h

@@ -86,6 +86,7 @@ class ExecCmd {
      * @param envassign an environment assignment string ("name=value")
      */
     void putenv(const string &envassign);
+    void putenv(const string &name, const string& value);
 
     /** 
      * Set function objects to call whenever new data is available or on