Strip more special characters out of post stubs

[Viper007Bond]

I have a client who writes all of their posts in MSWord and then copy/pastes them into WordPress, including the titles. However their titles are pre-wptexturized() basically with fancy single and double quotes, triple periods converted to a single character, etc. These don't get stripped when creating the stub and that results in some really ugly HTML entity based URLs.

We should expand the list of characters that get replaced/removed.

[Denis-de-Bernardy]

See also: #9591

[SergeyBiryukov]

#10797