doc: mention gethostid(3) in hostid(1)

* man/hostid.x: Add gethostid(3) to SEE ALSO section.
Addresses http://bugs.gnu.org/12023

diff --git a/man/hostid.x b/man/hostid.x
index 1bba0a630d88ce46cfb7bdb1c1b424dfbe87e322..767a3e2b0ae8983cc509c1249e04b2bf71bca658 100644 (file)
--- a/man/hostid.x
+++ b/man/hostid.x
@@ -2,3 +2,5 @@
 hostid \- print the numeric identifier for the current host
 [DESCRIPTION]
 .\" Add any additional description here
+[SEE ALSO]
+gethostid(3)