+-------------------------------------------------------
+nmh-local functions to use in preference to OS versions
+-------------------------------------------------------
+
+For some system functions whose availability or behavior varies from OS to OS,
+nmh conditionally uses a local definition with the same name as the OS function
+(e.g. snprintf()). For other functions, developers need to avoid the OS
+versions and always use the nmh-supplied function. Here is a list of such
+functions:
+
+OS function nmh-local version to use instead
+=========== ================================
+getpass() nmh_getpass()
+
+