cloudfoundry-cli 6.1.0

This change updates the formula to install cloudfoundry-cli v6.1.0. It
also updates the formula to handle the new Version and BuiltOnDate
constants.
cloudfoundry-cli: add 6.1.0 bottle.

Closes #28319.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
 libdvdcss: remove unused configure switch
audit: use .diff instead of .patch for github diffs
phantomjs: use diff instead of patch
sshguard: fix caveats (pf rule blocking all inbound ssh traffic)

Closes #28327.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
freerdp: fix patches

Closes #28323.
Fixes #28256.
sysdig 0.1.73 (new formula)

Closes #28164.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
clens: use diff
brew: allow external cmds to use Homebrew.failed.
readall: set Homebrew.failed on exception.
tap: change the way to determine tap name unambiguously and the on-disk
representation

This commit also supports "-" and "_" in names of user and repository.