Fix build on systems without RTM_OLD* For example, FreeBSD has removed RTM_OLDADD and RTM_OLDDEL from its API in March 2014, with the message: Garbage collect long time obsoleted (or never used) stuff from routing API Only attempt to define behavior for these cases if they are defined. (cherry picked from commit fd352d41a79013114708e99510b6be3836200237) https://github.com/krb5/krb5/commit/37f87c189ff050c01282f3d8da7bc97fe8a9ea92 Author: Ben Kaduk Committer: Tom Yu Commit: 37f87c189ff050c01282f3d8da7bc97fe8a9ea92 Branch: krb5-1.12 src/lib/apputils/net-server.c | 4 ++++ 1 files changed, 4 insertions(+), 0 deletions(-)