[SCM] lwIP - A Lightweight TCPIP stack branch, master, updated. STABLE-2_1_0_RELEASE-522-g089697b

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- Log -----------------------------------------------------------------
commit 089697bb1cadf2d208ed43f936a9e4e4bd9b0b3b
Author: Florian La Roche <[email protected]>
Date:   Sat Nov 27 15:48:02 2021 +0100

    Use NULL instead of 0 as a pointer
    
    Recommended by 'sparse' tool

-----------------------------------------------------------------------

Summary of changes:
 contrib/apps/chargen/chargen.c      | 6 +++---
 contrib/examples/example_app/test.c | 2 +-
 src/api/sockets.c                   | 2 +-
 src/apps/http/httpd.c               | 2 +-
 src/apps/mqtt/mqtt.c                | 4 ++--
 src/core/dns.c                      | 2 +-
 src/core/ipv4/etharp.c              | 4 ++--
 src/core/pbuf.c                     | 2 +-
 8 files changed, 12 insertions(+), 12 deletions(-)


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