[PATCH 0/3] Remotes library, take 4

Updated for recent review. If remote section name starts with '/', it is 
ignored (like in 1.5.0). If a remote section option has no value, it is 
also ignored (so it doesn't crash, and to be forward-compatible if we 
introduce a boolean option later).

The struct refspec field and associated variables are spelled "dst".

Part 3 is unchanged.

	-Daniel
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