Fix segfault due to buffer overrun. This happens if a line with many backslashes appears in the status line context display.
Fix jmacs: ^X ^F and ^X ^B were not working
Build fixes for Solaris
Improve php highlighter: allow numbers in substitution variable names
Unicode tweak: treat private use characters (Co) as printable
Dockerfile highlighter: Add Docker new commands from 1.12, mark bad strings in arrays
Fix loading external charmaps