Use rtf format files for legacy OS X installer builds.
(Backport from 3.4 changes for Issue #17128.)

--HG--
branch : 2.7
rename : Mac/BuildScript/resources/license.rtf => Mac/BuildScript/resources/License.rtf
rename : Mac/BuildScript/resources/readme.rtf => Mac/BuildScript/resources/ReadMe.rtf
Issue #23047: Fix typo in pyporting.rst.

Patch by Chaitanya agrawal.

--HG--
branch : 2.7
pop the loop block even for infinite while loops (closes #23048)

--HG--
branch : 2.7
extra : source : 09f938915c6f5f0c9bba3f6f856e865263aa63b3