Add inadvertently-removed git pager options

Setting the `LESS` environment variable overrides the defaults used by
core.pager, which are FRX. Because `-R` is set in .bash_profile, only
`-FX` need be provided to provide the same option coverage.

src/.gitconfig

@@ -33,7 +33,7 @@
 	autocrlf = false
 	fscache = true
 	longpaths = true
-	pager = less -x1,5
+	pager = less -FX -x1,5
 	whitespace = cr-at-eol,tabwidth=4,trailing-space
 [diff]
 	colormoved = default