mail: commonalize send_r_n()

function                                             old     new   delta
send_mail_command                                     85      55     -30

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

mailutils/popmaildir.c

@@ -68,6 +68,7 @@
 static void pop3_checkr(const char *fmt, const char *param, char **ret)
 {
 	char *msg = send_mail_command(fmt, param);
+//FIXME: limit max len!!!
 	char *answer = xmalloc_fgetline(stdin);
 	if (answer && '+' == answer[0]) {
 		free(msg);