RIOT-2020.07.1 - Release Notes

This is a bug fixing release for the RIOT 2020.07 release. The following bugs were fixed:

#14670: tests/lwip_sock_tcp: fix -EADDRINUSE test

#14671: pkg/lwip: Use IS_ACTIVE() and bugfix - pkg/lwip: Compatibility with IS_USED() - pkg/lwip: Use IS_ACTIVE() & NETCONNTYPE_ISIPV6()

#14686: gnrc_sixlowpan_frag_vrb: fix cppcheck warning

#14693: cpu/msp430_common: fix thread_yield_higher() when called in isr

#14685: gnrc/nib: fix _idx_dsts() calculation

#14817: gnrc_sixlowpan_frag_rb: Check possibly uninitialized pointers