lwip: clean up patches

Issue #1327.

repos/libports/ports/lwip.hash

@@ -1 +1 @@
-8efd6dcd9b82e1b12a85fce9971ab8cd4898d6e0
+3608c569747383625a1bca182683c3668fa630b5

repos/libports/ports/lwip.port

@@ -16,7 +16,7 @@ PATCHES := $(addprefix src/lib/lwip/,window_scaling.patch \
                                      sockets_c_errno.patch \
                                      sol_socket_definition.patch)
 
-PATCH_OPT(src/lib/lwip/window_scaling.patch) := -p1 -d src/lib/lwip
+PATCH_OPT := -p1 -d src/lib/lwip
 
 DIRS := include/lwip/lwip include/lwip/netif
 

repos/libports/src/lib/lwip/errno.patch

@@ -1,4 +1,5 @@
-+++ src/lib/lwip/src/include/lwip/arch.h
+--- a/src/include/lwip/arch.h
++++ b/src/include/lwip/arch.h
 @@ -208,6 +208,12 @@ extern "C" {
  extern int errno;
  #endif

repos/libports/src/lib/lwip/libc_select_notify.patch

@@ -1,5 +1,6 @@
-+++ src/lib/lwip/src/api/sockets.c
-@@ -171,6 +171,9 @@ static const int err_to_errno_table[] = {
+--- a/src/api/sockets.c
++++ b/src/api/sockets.c
+@@ -243,6 +243,9 @@ static const int err_to_errno_table[] = {
    set_errno(sk->err); \
  } while (0)
  
@@ -9,7 +10,7 @@
  /* Forward delcaration of some functions */
  static void event_callback(struct netconn *conn, enum netconn_evt evt, u16_t len);
  static void lwip_getsockopt_internal(void *arg);
-@@ -1244,7 +1247,7 @@ return_copy_fdsets:
+@@ -1316,7 +1319,7 @@ return_copy_fdsets:
   * Processes recvevent (data available) and wakes up tasks waiting for select.
   */
  static void
@@ -18,7 +19,7 @@
  {
    int s;
    struct lwip_sock *sock;
-@@ -1359,6 +1362,17 @@ again:
+@@ -1431,6 +1434,17 @@ again:
    SYS_ARCH_UNPROTECT(lev);
  }
  

repos/libports/src/lib/lwip/sockets_c_errno.patch

@@ -3,8 +3,9 @@ connection is established but never EISCONN. So most programs will
 fail to connect because they at one point while connecting expect to
 get EISCONN.
 
-+++ src/lib/lwip/src/api/sockets.c
-@@ -142,7 +142,7 @@ static const int err_to_errno_table[] = {
+--- a/src/api/sockets.c
++++ b/src/api/sockets.c
+@@ -214,7 +214,7 @@ static const int err_to_errno_table[] = {
    EINVAL,        /* ERR_VAL        -6      Illegal value.           */
    EWOULDBLOCK,   /* ERR_WOULDBLOCK -7      Operation would block.   */
    EADDRINUSE,    /* ERR_USE        -8      Address in use.          */

repos/libports/src/lib/lwip/sol_socket_definition.patch

@@ -2,8 +2,9 @@ Our FreeBSD libc based libc defines SOL_SOCKET as 0xffff. We change
 lwip's definition from 0xfff to match ours. This prevents us from
 converting the level when we call {g,s}etsockopt.
 
-+++ src/lib/lwip/src/include/lwip/sockets.h
-@@ -115,7 +115,7 @@ struct linger {
+--- a/src/include/lwip/sockets.h
++++ b/src/include/lwip/sockets.h
+@@ -131,7 +131,7 @@ struct linger {
  /*
   * Level number for (get/set)sockopt() to apply to socket itself.
   */