Git 2.20.5

1. 0ec7935 thread-utils: macros to unconditionally compile pthreads API by Nguyễn Thái Ngọc Duy · 7 years ago
2. 0c45d25 pack-objects: set number of threads before checking and warning by Junio C Hamano · 11 years ago
3. b361888 thread-utils.h: simplify the inclusion by Junio C Hamano · 15 years ago
4. 9374919 Thread-safe xmalloc and xrealloc needs a recursive mutex by Johannes Sixt · 16 years ago
5. 833e3df pack-objects: Add runtime detection of online CPU's by Andreas Ericsson · 18 years ago