Prefer RCRC environment variable over ~/.rcrc

* Centralize configuration loading in rcm.sh(.in)
* Check for readability, not just existence

Add RCRC notes to all manpages. Putting the environment variables in a
table lines them up more neatly and definitively, across all output
formats, and also follows the examples used by e.g. BSD ls(1).

1 files changed, 6 insertions, 0 deletions

diff --git a/man/mkrc.1 b/man/mkrc.1
index f5e1918..384b485 100644
--- a/man/mkrc.1
+++ b/man/mkrc.1
@@ -33,6 +33,12 @@ install dotfiles according to tag
 .It Fl v
 increase verbosity. This can be repeated for extra verbosity.
 .El
+.Sh ENVIRONMENT
+.Bl -tag -width ".Ev RCRC"
+.It Ev RCRC
+User configuration file. Defaults to
+.Pa ~/.rcrc .
+.El
 .Sh FILES
 .Pa ~/.dotfiles
 .Pa ~/.rcrc