Fixed bug #41500 SMTP base64 patch
Merge branch 'master' of git://git.savannah.nongnu.org/lwip/lwip-contrib
minor: tcpdump: fixed source code layout
minor: unix port removed unused define IPv4
partly applied patch #8357: fix compiler warnings in tcpdump.c
Merge branch 'master' of git://git.savannah.nongnu.org/lwip/lwip-contrib