tiger-vnc: inline patches as SF links broke.

Closes #22033.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
Simplify llvm formula.

* Stop shipping most binaries except llvm-config. Now llvm is supposed to be
  used as a library only.
* Add caveat to point user to homebrew-versions for full featured llvms.
python & python3: Don't tell how to upgrade pip

Pip and setuptools can't be updated the way we write in the caveats.
This is because pip fails to remove the symlink from the
`brew --prefix`. Also we said that we don't like self-updating tools.

We will rather update the python formula, and bump the revision
(once we have the revision feature) when pip or setuptools get
updated.
Merge remote-tracking branch 'mxcl/master'