Whenever the daemon re-loads its config, it keeps any socket-based
(AF_INET) SOCK_DGRAM interfaces open that are matched by the new config,
but it used to close and then re-open all local (AF_UNIX) interfaces and
file-based interfaces such as SOCK_FILE dummy files and SOCK_STREAM
device files. This made it very difficult to develop the new
'routejava' test suite, because the Java API test harness always causes
a config re-load when it sets the REST API user/password in the config,
which caused the local socket interfaces to bounce, which interfered
with the reachability of nodes.
Now, local socket and file-based interfaces remain up after a config
re-load, as long as they are still matched by the new configuration.
Added INFO messages for interfaces that remain up after a config
re-load, and tweak interface up/down INFO messages to be consistent.
- make "debug.h" a private header so that the DEBUG() macro does not
interfere with Xcode Debug builds, which set DEBUG=1
- move all #include "debug.h" from headers into .c files
- move 'struct idebug' into a new public header "idebug.h" so that
"log.h" can be public
- move HTTPD port number defs from "httpd.h" to "constants.h", so that
"httpd.h" can be private and "conf.h" can be public
- add missing nested includes so each header compiles stand-alone
without error
- #include "sodium.h" instead of <sodium.h>
- #include "sqlite3.h" instead of <sqlite3.h>
- add header guard to "fifo.h"
- fix header guard in "sync_keys.h"
