Vim 7.3.976

Closes #19942.
Closes #19943.
Closes #19944.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
editorconfig 0.11.5

Closes #19939.
Closes #19941.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
MacOS::Version: add :tiger
sqlite 3.7.17
zeromq: apply patch for strndup on 10.6

Fixes #19877.
link: extract keg-only check into a helper method
build: use ARGV.interactive? instead of .flag?
Add test for ARGV.flag?
Simplify implementation of ARGV.flag? and .switch?