Split up glasgow_exts.rst
The docs/users-guide/glasgow_exts.rst is crazy large. This makes it difficult to navigate both while editing and reading. It should probably be split up into multiple files along the top-level headings.
Trac metadata
| Trac field | Value |
|---|---|
| Version | 8.0.1 |
| Type | Task |
| TypeOfFailure | OtherFailure |
| Priority | normal |
| Resolution | Unresolved |
| Component | Documentation |
| Test case | |
| Differential revisions | |
| BlockedBy | |
| Related | |
| Blocking | |
| CC | |
| Operating system | |
| Architecture |