[PATCH v2 0/3] Some small fixes to glossary-content.txt

This is a reroll of my patches for glossary-content.txt
with Junio's comments/suggestions included:

[PATCH 1/3] glossary: remove outdated/misleading/irrelevant entries
- keep entries for "directory" and "evil merge"
- keep comparison of "Git tag" to "Lisp tag"
[PATCH 2/3] glossary: improve description of SHA-1 related topics
- more suitable description for "object name"
- use "SHA-1" instead of "SHA1"
[PATCH 3/3] glossary: remove definition of refspec and pathspec
- further small changes to description of refspec and pathspec


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Thomas