[SCM] lwIP - A Lightweight TCPIP stack branch, master, updated. STABLE-2_1_0_RELEASE-249-gff93961

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commit ff93961ff4c82bc0f6e981d7003b808355cf2a8b
Author: Dirk Ziegelmeier <[email protected]>
Date:   Wed Mar 20 20:50:35 2019 +0100

    Update .gitignore for latest VSCode

commit 4b10b4dab3e8f66ee730d6d48e9f494c45dbd967
Author: Dirk Ziegelmeier <[email protected]>
Date:   Wed Mar 20 20:50:17 2019 +0100

    Add note about MEMP_NUM_SYS_TIMEOUT in four apps

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

Summary of changes:
 .gitignore           |  2 ++
 doc/mqtt_client.txt  | 38 ++++++++++++++++++++------------------
 src/apps/mdns/mdns.c |  2 ++
 src/apps/sntp/sntp.c |  2 ++
 src/apps/tftp/tftp.c |  1 +
 5 files changed, 27 insertions(+), 18 deletions(-)


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