Fix y2038 issues with time_t conversion

These changes were identified by building with and without
-D_TIME_BITS=64 -D_FILE_OFFSET_BITS=64
on 32-bit arm, logging warnings to files.
-Wconversion was added to CFLAGS in both builds.

Then a "diff -I Wconversion log1 log2" shows new warnings that appear
with the 64-bit time_t. There are a few false positives that have been
fixed for quietness.

struct logininfo and struct wtmp are still problematic, those will
need to be handled by libc.

1 files changed, 2 insertions, 2 deletions

diff --git a/runopts.h b/runopts.h
index 1675836..d44283d 100644
--- a/runopts.h
+++ b/runopts.h
@@ -39,8 +39,8 @@ typedef struct runopts {
 	int listen_fwd_all;
 #endif
 	unsigned int recv_window;
-	time_t keepalive_secs; /* Time between sending keepalives. 0 is off */
-	time_t idle_timeout_secs; /* Exit if no traffic is sent/received in this time */
+	long keepalive_secs; /* Time between sending keepalives. 0 is off */
+	long idle_timeout_secs; /* Exit if no traffic is sent/received in this time */
 	int usingsyslog;
 
 #ifndef DISABLE_ZLIB