Merge branch 'maint'

* maint:
  RelNotes-1.5.3.5: describe recent fixes
  merge-recursive.c: mrtree in merge() is not used before set
  sha1_file.c: avoid gcc signed overflow warnings
  Fix a small memory leak in builtin-add
  honor the http.sslVerify option in shell scripts

diff --cc builtin-add.c
Simple merge

diff --cc merge-recursive.c
Simple merge

diff --cc sha1_file.c
Simple merge