pptpd: import from old packages

Signed-off-by: Luka Perkov <luka@openwrt.org>

net/pptpd/patches/001-bad_pqueue_debug.patch

@@ -0,0 +1,18 @@
+--- a/pqueue.c
++++ b/pqueue.c
+@@ -7,13 +7,11 @@
+ #include "pqueue.h"
+ 
+ #ifdef DEBUG_PQUEUE
+-#define DEBUG_ON 1
++#define DEBUG_CMD(_a) { _a }
+ #else
+-#define DEBUG_ON 0
++#define DEBUG_CMD(_a)
+ #endif
+ 
+-#define DEBUG_CMD(_a) if (DEBUG_ON) { _a }
+-
+ #define MIN_CAPACITY 128 /* min allocated buffer for a packet */
+ 
+ static int pqueue_alloc (int seq, unsigned char *packet, int packlen, pqueue_t **new);