core.configmanager: Add ways to read config values from files

Inspired by something MattJ said

Allows retrieving config values from files which are expected to be
relative to the config directory, extending on the ENV_ method of
retrieving config values from outside the config file.

- FileLine retrieves the first line, stripping any trailing newline
- FileContents reads the whole file
- FileLines reads lines into an array

1 files changed, 1 insertions, 0 deletions

diff --git a/CHANGES b/CHANGES
index 4b3f0b6f..e4f0d269 100644
--- a/CHANGES
+++ b/CHANGES
@@ -60,6 +60,7 @@ TRUNK
 
 - The configuration file now supports referring and appending to options previously set
 - Direct usage of the Lua API in the config file is deprecated, but can now be accessed via Lua.* instead
+- Convenience functions for reading values from files
 
 ## Changes