When choosing a suffix for a temp file, ensure that we only use the first entry in mimemap for a given MIME type. Avoids exotic suffixes confusing apps

src/utils/conftree.cpp

@@ -415,6 +415,7 @@ int ConfSimple::i_set(const std::string& nm, const std::string& value,
         // During the initial construction, just append:
         CONFDEB("ConfSimple::i_set: init true: append\n");
         m_order.push_back(ConfLine(ConfLine::CFL_VAR, nm));
+        m_order.back().m_value = value;
         return 1;
     }
 

src/utils/conftree.h

@@ -71,6 +71,7 @@ public:
     enum Kind {CFL_COMMENT, CFL_SK, CFL_VAR, CFL_VARCOMMENT};
     Kind m_kind;
     std::string m_data;
+    std::string m_value;
     std::string m_aux;
     ConfLine(Kind k, const std::string& d, std::string a = std::string())
         : m_kind(k), m_data(d), m_aux(a) {