Merge branch 'maint'

* maint:
Prepare draft release notes to 1.7.4.2
gitweb: highlight: replace tabs with spaces
make_absolute_path: return the input path if it points to our buffer
valgrind: ignore SSE-based strlen invalid reads
diff --submodule: split into bite-sized pieces
cherry: split off function to print output lines
branch: split off function that writes tracking info and commit subject
standardize brace placement in struct definitions
compat: make gcc bswap an inline function
enums: omit trailing comma for portability

Conflicts:
RelNotes

diff --cc builtin/add.c
Simple merge

diff --cc builtin/grep.c
Simple merge

diff --cc builtin/log.c
Simple merge

diff --cc cache.h
Simple merge

diff --cc config.c
Simple merge

diff --cc fast-import.c
Simple merge

diff --cc merge-recursive.c
Simple merge

diff --cc transport-helper.c
Simple merge