Here's how I sorted out the licenses:

• imgui.cpp has a license mention that was getting detected as a full license, so I added a unique signature to the license mentions list, which seems to be for this purpose.
• There's a generated opengl loader in the examples (generated by this) which contains the Unlicense statement and no copyright claim, so I added this text to the "csNoCopyrights" list.
• The examples contain a copy of the Synergy micro client, which contain zlib copyright headers. The text wraps differently than the other zlib variations, so I appended it a new variation below the others.

The dependency is test-only. This may be ignored by the script.

Ah I totally missed that. Well at least I know how the license script works now. :)

Alrighty, I excluded imgui from the license script.