[curl/curl] 847b13: CHECKSRC.md: document more warnings

[GitHub]

Branch: refs/heads/master
Home: https://github.com/curl/curl
Commit: 847b13024417ea42b0123fcdb33ce53bf12619f7
https://github.com/curl/curl/commit/847b13024417ea42b0123fcdb33ce53bf12619f7
Author: Daniel Stenberg <***@haxx.se>
Date: 2018-12-03 (Mon, 03 Dec 2018)

Changed paths:
M docs/CHECKSRC.md

Log Message:
-----------
CHECKSRC.md: document more warnings

Closes #3335
[ci skip]



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