Migrate info from INSTALL.md into doc/QuickStart.md

Move most information regarding configuring ngIRCd into the
doc/QuickStart.md document, only describe building and installing ngIRCd
in the INSTALL.md file. Don't duplicate content!

Add references where this makes sense.

1 files changed, 16 insertions, 2 deletions

diff --git a/doc/QuickStart.md b/doc/QuickStart.md
index d2e23568..8e5e5464 100644
--- a/doc/QuickStart.md
+++ b/doc/QuickStart.md
@@ -19,8 +19,12 @@ everything was parsed as expected!
 
 ### Configuration File and Drop-in Directory
 
-The `ngircd --configtest` command shows the name of the default configuration
-file, too. For example `/etc/ngircd/ngircd.conf`.
+After installing ngIRCd, a sample configuration file should have been set up if
+none existed already. By default, when installing from sources, the file is
+named `/usr/local/etc/ngircd.conf` (other common names, especially for
+distribution packages, are `/etc/ngircd.conf` or `/etc/ngircd/ngircd.conf`).
+Run the command `ngircd --configtest` to check the name of the configuration
+file which is used by default on your local system.
 
 In addition, ngIRCd supports further configuration file snippets in a "drop-in"
 directory which is configured with the `IncludeDir` variable in the `[Options]`
@@ -32,6 +36,11 @@ ore more new files in this include directory, overriding the defaults as
 needed. This way you don't get any clashes when updating ngIRCd to newer
 releases.
 
+You can find the template of the sample configuration file in the `doc/`
+directory as `sample-ngircd.conf` and
+[online](https://ngircd.barton.de/doc/sample-ngircd.conf) on the homepage. It
+contains all available options.
+
 ## Configuration File Syntax
 
 The configuration consists of sections and parameters.
@@ -45,6 +54,11 @@ Section and parameter names are not case sensitive.
 Please see the `ngircd.conf`(5) manual page for an in-depth description of the
 configuration file, its syntax and all supported configuration options.
 
+The sample configuration file uses comments beginning with `#` *or* `;` -- this
+is only for the better understanding of the file, both comment styles are
+equal. The lines commented out with `;` show example or default settings,
+whereas the lines using `#` are descriptions of the options.
+
 ## Simple Single-Instance Server
 
 A good starting point is to configure a valid (and unique!) IRC server name