[monitoring-plugins] Switch guidelines to use bool instead of int for ...

[RincewindsHat]

 Module: monitoring-plugins
 Branch: master
 Commit: 565e23a7df9a99ac60c3dbc9692b33497423188b
 Author: RincewindsHat <12514511+RincewindsHat at users.noreply.github.com>
   Date: Tue Sep 12 15:50:00 2023 +0200
    URL: https://www.monitoring-plugins.org/repositories/monitoring-plugins/commit/?id=565e23a

Switch guidelines to use bool instead of int for booleans

---

 doc/developer-guidelines.sgml | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/doc/developer-guidelines.sgml b/doc/developer-guidelines.sgml
index c900aea..37c963e 100644
--- a/doc/developer-guidelines.sgml
+++ b/doc/developer-guidelines.sgml
@@ -733,9 +733,9 @@ setup the tests. Run "make test" to run all the tests.
 	<para>Variables should be declared at the beginning of code blocks and
 	not inline because of portability with older compilers.</para>
 
-	<para>You should also avoid using the type "bool" and its values
-	"true" and "false". Instead use the "int" type and the plugins' own
-	"TRUE"/"FALSE" values to keep the code uniformly.</para>
+	<para>You should use the type "bool" and its values
+	"true" and "false" instead of the "int" type for booleans.
+	</para>
 	</section>
 
 	<section><title>Crediting sources</title>