[Ovmsdev] Branch for-v3.3 network issues

[Craig Leres]

Second crash on the production module, CORRUPT HEAP after ~350 minutes.

sim7600 module still running after 19 hours. Looks like the cell connect 
stayed up for 11 hours before going into "User Interrupt" mode.

		Craig

===========================================

I (25449286) script: [eval:1:] usr.testev.10: 2094300
I (25452446) script: [eval:1:] usr.testev.10: 2094600
I (25455606) script: [eval:1:] usr.testev.10: 2094900
OVMS# CORRUPT HEAP: Bad head at 0x3f8adc78. Expected 0xabba1234 got 
0x3f8adcc0
abort() was called at PC 0x400844c3 on core 0

ELF file SHA256: 9fe3cd9b4b911bd8

Backtrace: 0x40089a2f:0x3ffcbb10 0x40089cc9:0x3ffcbb30 
0x400844c3:0x3ffcbb50 0x400845dd:0x3ffcbb90 0x401185ab:0x3ffcbbb0 
0x4010d979:0x3ffcbe70 0x4010d4c9:0x3ffcbec0 0x4008e903:0x3ffcbef0 
0x400840b1:0x3ffcbf10 0x40084671:0x3ffcbf30 0x4000bec7:0x3ffcbf50 
0x401aa715:0x3ffcbf70 0x400f5a51:0x3ffcbf90 0x4008d3af:0x3ffcbfb0

Rebooting...
ets Jul 29 2019 12:21:46

===========================================

ice 182 % ./backtrace.sh 0x40089a2f:0x3ffcbb10 0x40089cc9:0x3ffcbb30 
0x400844c3:0x3ffcbb50 0x400845dd:0x3ffcbb90 0x401185ab:0x3ffcbbb0 
0x4010d979:0x3ffcbe70 0x4010d4c9:0x3ffcbec0 0x4008e903:0x3ffcbef0 
0x400840b1:0x3ffcbf10 0x40084671:0x3ffcbf30 0x4000bec7:0x3ffcbf50 
0x401aa715:0x3ffcbf70 0x400f5a51:0x3ffcbf90 0x4008d3af:0x3ffcbfb0
+ xtensa-esp32-elf-addr2line -e build/ovms3.elf 0x40089a2f:0x3ffcbb10 
0x40089cc9:0x3ffcbb30 0x400844c3:0x3ffcbb50 0x400845dd:0x3ffcbb90 
0x401185ab:0x3ffcbbb0 0x4010d979:0x3ffcbe70 0x4010d4c9:0x3ffcbec0 
0x4008e903:0x3ffcbef0 0x400840b1:0x3ffcbf10 0x40084671:0x3ffcbf30 
0x4000bec7:0x3ffcbf50 0x401aa715:0x3ffcbf70 0x400f5a51:0x3ffcbf90 
0x4008d3af:0x3ffcbfb0
/home/ice/u0/leres/esp/openvehicles-xtensa-esp32-elf/components/esp32/panic.c:736
/home/ice/u0/leres/esp/openvehicles-xtensa-esp32-elf/components/esp32/panic.c:736
/home/ice/u0/leres/esp/openvehicles-xtensa-esp32-elf/components/newlib/locks.c:143
/home/ice/u0/leres/esp/openvehicles-xtensa-esp32-elf/components/newlib/locks.c:171
/Users/ivan/e/newlib_xtensa-2.2.0-bin/newlib_xtensa-2.2.0/xtensa-esp32-elf/newlib/libc/stdio/../../../.././newlib/libc/stdio/vfprintf.c:860 
(discriminator 2)
/Users/ivan/e/newlib_xtensa-2.2.0-bin/newlib_xtensa-2.2.0/xtensa-esp32-elf/newlib/libc/stdio/../../../.././newlib/libc/stdio/fiprintf.c:50
/Users/ivan/e/newlib_xtensa-2.2.0-bin/newlib_xtensa-2.2.0/xtensa-esp32-elf/newlib/libc/stdlib/../../../.././newlib/libc/stdlib/assert.c:59 
(discriminator 8)
/home/ice/u0/leres/esp/openvehicles-xtensa-esp32-elf/components/heap/multi_heap_poisoning.c:350
/home/ice/u0/leres/esp/openvehicles-xtensa-esp32-elf/components/heap/heap_caps.c:403
/home/ice/u0/leres/esp/openvehicles-xtensa-esp32-elf/components/newlib/syscalls.c:42
??:0
/wrkdirs/usr/ports/devel/xtensa-esp32-elf/work/crosstool-NG-1.22.0-97-gc752ad5/.build/src/gcc-5.2.0/libstdc++-v3/libsupc++/del_op.cc:46
main/ovms_events.cpp:393
/home/ice/u0/leres/esp/openvehicles-xtensa-esp32-elf/components/freertos/timers.c:485