xfoo => mfoo, add comment

diff --git a/backends/innduct.c b/backends/innduct.c
index 36dc8aac0e99454ceca11a43a10fb637879a73ee..5d49ea6620232718523e7fece16104d2624432d7 100644 (file)
--- a/backends/innduct.c
+++ b/backends/innduct.c
@@ -608,6 +608,11 @@ logwrap(debug,    " debug",    LOG_DEBUG,   -1);
 
 /*========== utility functions etc. ==========*/
 
+/* error trapping wrappers are called mfoo rather than the more
+ * conventional xfoo because we don't want to clash with the existing
+ * xfoo functions in INN libs which use different error handlers
+ */
+
 static char *mvasprintf(const char *fmt, va_list al) PRINTF(1,0);
 static char *mvasprintf(const char *fmt, va_list al) {
   char *str;