See last link for the details about the following highlights:
- Fix image style generation for d7
- Adopt new form elements for update notifications during site installation.
- Documented local paths for patches in makefile (#2769)
- Fix #2756 #2723 drush init causes .bashrc syntax to break
- Workaround segmentation fault when clearing caches. (#2765)
- Changes since 8.1.11.