dot/xinitrc: Use modern command-substitution syntax.

The old backtick syntax was kind of bletcherous, and it doesn't nest
well.

diff --git a/dot/xinitrc b/dot/xinitrc
index 51a9cae..76df3f2 100755 (executable)
--- a/dot/xinitrc
+++ b/dot/xinitrc
@@ -108,7 +108,7 @@ fi
 ### Iniitial settings.
 
 ## Assume X sessions are secure.
-export __mdw_sechost="`hostname`"
+export __mdw_sechost="$(hostname)"
 
 ## Obtain the screen dimensions.
 case ",$XWIDTH,$XHEIGHT," in