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/rcup.1 b/man/rcup.1
index 9b2aa08..8839159 100644
--- a/man/rcup.1
+++ b/man/rcup.1
@@ -170,6 +170,12 @@ or from
 The post-up hook is run.
 .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