Remove unused (and duplicate) struct ip_opts which is never used,

not referenced in Stevens, and does not compile with g++.
There is an equivalent structure, struct ipoption in ip_var.h
which is actually used in various parts of the kernel, and also referenced
in Stevens.

Bill Fenner also says:
... if you want the trivia, struct ip_opts was introduced
in in.h SCCS revision 7.9, on 6/28/1990, by Mike Karels.
struct ipoption was introduced in ip_var.h SCCS revision 6.5,
on 9/16/1985, by... Mike Karels.

MFC-after: 3 days

1 files changed, 0 insertions, 12 deletions

diff --git a/sys/netinet/in.h b/sys/netinet/in.h
index c4f944d..a80877d 100644
--- a/sys/netinet/in.h
+++ b/sys/netinet/in.h
@@ -294,18 +294,6 @@ struct sockaddr_in {
 #define	INET_ADDRSTRLEN                 16
 
 /*
- * Structure used to describe IP options.
- * Used to store options internally, to pass them to a process,
- * or to restore options retrieved earlier.
- * The ip_dst is used for the first-hop gateway when using a source route
- * (this gets put into the header proper).
- */
-struct ip_opts {
-	struct	in_addr ip_dst;		/* first hop, 0 w/o src rt */
-	char	ip_opts[40];		/* actually variable in size */
-};
-
-/*
  * Options for use with [gs]etsockopt at the IP level.
  * First word of comment is data type; bool is stored in int.
  */