git: 63a9c046c5 - main - Developers handbook - Add missing header in sockets chapter

The branch main has been updated by carlavilla:

URL: https://cgit.FreeBSD.org/doc/commit/?id=63a9c046c590eb34c3c398889498dbf1bf4965a7

commit 63a9c046c590eb34c3c398889498dbf1bf4965a7
Author:     QWERTIOX <[email protected]>
AuthorDate: 2023-04-08 09:48:12 +0000
Commit:     Sergio Carlavilla Delgado <[email protected]>
CommitDate: 2023-04-08 09:48:12 +0000

    Developers handbook - Add missing header in sockets chapter
    
    Tested with llvm 15
    
    Pull Request:   https://github.com/freebsd/freebsd-doc/pull/150
---
 documentation/content/en/books/developers-handbook/sockets/_index.adoc | 1 +
 1 file changed, 1 insertion(+)

diff --git a/documentation/content/en/books/developers-handbook/sockets/_index.adoc b/documentation/content/en/books/developers-handbook/sockets/_index.adoc
index 640f4524da..3504da6720 100644
--- a/documentation/content/en/books/developers-handbook/sockets/_index.adoc
+++ b/documentation/content/en/books/developers-handbook/sockets/_index.adoc
@@ -559,6 +559,7 @@ We now know enough to write a very simple client, one that will get current time
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <netinet/in.h>
+#include <unistd.h>
 
 int main() {
   register int s;