net/fping: fix WITHOUT_IPV6 mode

If one builds and uses net/fping version 4.2 with option IPV6 disabled,
the command fping -4 always fails with wrong error message:

fping: can't specify both -4 and -6

This makes it impossible using fping probes with SmokePing
as it runs fping with -4 option. This change fixes this.
Also, do not install symlinks for fping6 and manual in this case.

PORTREVISION not bumped as default build is not affected.

PR:		238327
Approved by:	jharris@widomaker.com (maintainter timeout, 2 weeks)

1 files changed, 11 insertions, 0 deletions

diff --git a/net/fping/files/patch-src_fping.c b/net/fping/files/patch-src_fping.c
new file mode 100644
index 000000000000..d4b49fc8f9dd
--- /dev/null
+++ b/net/fping/files/patch-src_fping.c
@@ -0,0 +1,11 @@
+--- src/fping.c.orig	2019-02-19 20:54:45 UTC
++++ src/fping.c
+@@ -427,7 +427,7 @@ int main(int argc, char** argv)
+     while ((c = optparse_long(&optparse_state, longopts, NULL)) != EOF) {
+         switch (c) {
+         case '4':
+-            if (hints_ai_family != AF_UNSPEC) {
++            if (hints_ai_family == AF_INET6) {
+                 fprintf(stderr, "%s: can't specify both -4 and -6\n", prog);
+                 exit(1);
+             }