ccache: Updated caveat with better instructions

I also added a note about `ccache` never being
used by `brew` since that can be confusing.

Closes #20594.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
Qt: Link Framework correctly into brew prefix
depends_on :python => 'module' allow user packages

Some prefer to install with `--user` into their
home. For example to avoid `sudo` with system's
python. Now Homebrew can use those modules to
satisfy a python dependency on a certain module.
doctor: share/python no longer needed in PATH

Check for HOMEBREW_PREFIX/share/python and python3
in PATH and tell about the new location and that
files from there can be removed. Also instructions
on how to upgrade python packages are given.
subversion: improve build time (use deparallelize only when necessary)

Closes #20602.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
subversion 1.8.0

Closes #20600.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
libsass: silent update back to previous sha1
zsh: generate helpfiles for run-help

Closes #20589.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
gobby: fix build against gtkmm
RethinkDB 1.6.1

Closes #20607.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
subversion: remove unicode patch

Patch no longer applies.

Closes #20609.
postgresql: Enable LDAP and PAM build options

Closes #20603.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
MacVim: apply ENV.clang on Lion too

Closes #20604.
MacVim: only need font when building icons

Closes #20606.