patch 8.0.0082
Problem: Extension for configure should be ".ac".
Solution: Rename configure.in to configure.ac. (James McCoy, closes #1173)
diff --git a/src/channel.c b/src/channel.c
index aa82d71..1ddb1ec 100644
--- a/src/channel.c
+++ b/src/channel.c
@@ -19,7 +19,7 @@
# define CH_HAS_GUI (gui.in_use || gui.starting)
#endif
-/* Note: when making changes here also adjust configure.in. */
+/* Note: when making changes here also adjust configure.ac. */
#ifdef WIN32
/* WinSock API is separated from C API, thus we can't use read(), write(),
* errno... */