man: use <function> where we refer to functions

diff --git a/man/sd_listen_fds.xml b/man/sd_listen_fds.xml
index ea55671..ccd1266 100644 (file)
--- a/man/sd_listen_fds.xml
+++ b/man/sd_listen_fds.xml
@@ -147,7 +147,7 @@
     way. The returned array of strings has as many entries as file
     descriptors has been received, plus a final NULL pointer
     terminating the array. The caller needs to free the array itself
-    and each of its elements with libc's <varname>free()</varname>
+    and each of its elements with libc's <function>free()</function>
     call after use. If the <parameter>names</parameter> parameter is
     NULL the call is entirely equivalent to
     <function>sd_listen_fds()</function>.</para>