BIND 10 trac2310, updated. 31707f9fd9a78add4895394d0168d5664184b18f [2310] added notes about htonl() portability considerations

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- Log -----------------------------------------------------------------
commit 31707f9fd9a78add4895394d0168d5664184b18f
Author: JINMEI Tatuya <jinmei at isc.org>
Date:   Tue Jan 29 13:42:58 2013 -0800

    [2310] added notes about htonl() portability considerations

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Summary of changes:
 src/lib/datasrc/memory/zone_data.cc |    3 +++
 1 file changed, 3 insertions(+)

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diff --git a/src/lib/datasrc/memory/zone_data.cc b/src/lib/datasrc/memory/zone_data.cc
index f9c0e3a..d32fc87 100644
--- a/src/lib/datasrc/memory/zone_data.cc
+++ b/src/lib/datasrc/memory/zone_data.cc
@@ -138,6 +138,9 @@ namespace {
 // A helper to convert a TTL value in network byte order and set it in
 // ZoneData::min_ttl_.  We can use util::OutputBuffer, but copy the logic
 // here to guarantee it is exception free.
+// Note: essentially this function is a local (re)implementation of the
+// standard htonl() library function, but we avoid relying on it in case it's
+// not available (it's not in the C++ standard library).
 void
 setTTLInNetOrder(uint32_t val, uint32_t* result) {
     uint8_t buf[4];