Factor out time keeping code into its own module: mono_time.c.

It turns out, `unix_time` is also monotonic, and is used as such, so I've
renamed the new functions to `mono_time_*`.

2018-07-08:
```
00:01 <@irungentoo> the idea used to be that the unix_time() function
  could go backward in time but I think I might have started using it like
  if it could not after I changed it so that it would never go back in time
```

6 files changed, 4 insertions, 7 deletions

diff --git a/other/DHT_bootstrap.c b/other/DHT_bootstrap.c
index f263b471..b71ab0b1 100644
--- a/other/DHT_bootstrap.c
+++ b/other/DHT_bootstrap.c
@@ -33,6 +33,7 @@
 #include "../toxcore/LAN_discovery.h"
 #include "../toxcore/friend_requests.h"
 #include "../toxcore/logger.h"
+#include "../toxcore/mono_time.h"
 #include "../toxcore/tox.h"
 #include "../toxcore/util.h"
 
diff --git a/other/bootstrap_daemon/src/tox-bootstrapd.c b/other/bootstrap_daemon/src/tox-bootstrapd.c
index 3c6d5d2c..fd05f8a2 100644
--- a/other/bootstrap_daemon/src/tox-bootstrapd.c
+++ b/other/bootstrap_daemon/src/tox-bootstrapd.c
@@ -38,6 +38,7 @@
 #include "../../../toxcore/LAN_discovery.h"
 #include "../../../toxcore/TCP_server.h"
 #include "../../../toxcore/logger.h"
+#include "../../../toxcore/mono_time.h"
 #include "../../../toxcore/onion_announce.h"
 #include "../../../toxcore/util.h"
 
diff --git a/other/monolith.h b/other/monolith.h
index 426ba0d9..356252f2 100644
--- a/other/monolith.h
+++ b/other/monolith.h
@@ -13,6 +13,7 @@
 #include "../toxcore/group.c"
 #include "../toxcore/list.c"
 #include "../toxcore/logger.c"
+#include "../toxcore/mono_time.c"
 #include "../toxcore/network.c"
 #include "../toxcore/net_crypto.c"
 #include "../toxcore/onion.c"
diff --git a/other/travis/env-freebsd.sh b/other/travis/env-freebsd.sh
index f9aa0cbf..882e9da5 100644
--- a/other/travis/env-freebsd.sh
+++ b/other/travis/env-freebsd.sh
@@ -1,9 +1,6 @@
 #!/bin/sh
 
 CMAKE=cmake
-# Asan is disabled because it's currently broken in FreeBSD 11.
-# We should try enabling it in the next FreeBSD release and see if it works.
-CMAKE_EXTRA_FLAGS="$CMAKE_EXTRA_FLAGS -DASAN=OFF"
 NPROC=`nproc`
 CURDIR=/root
 RUN_TESTS=true
diff --git a/other/travis/env.sh b/other/travis/env.sh
index 7d90d395..2d3e646c 100644
--- a/other/travis/env.sh
+++ b/other/travis/env.sh
@@ -8,7 +8,6 @@ export PKG_CONFIG_PATH=$CACHE_DIR/lib/pkgconfig
 export ASTYLE=$CACHE_DIR/astyle/build/gcc/bin/astyle
 export CFLAGS="-O3 -DTRAVIS_ENV=1"
 export CXXFLAGS="-O3 -DTRAVIS_ENV=1"
-export CMAKE_EXTRA_FLAGS="-DERROR_ON_WARNING=ON"
 export MAKE=make
 
 BUILD_DIR=_build
diff --git a/other/travis/toxcore-script b/other/travis/toxcore-script
index f82fd978..ae2af416 100755
--- a/other/travis/toxcore-script
+++ b/other/travis/toxcore-script
@@ -28,14 +28,12 @@ RUN $CMAKE                                      \
   -B$BUILD_DIR                                  \
   -H.                                           \
   -DCMAKE_INSTALL_PREFIX:PATH=$CURDIR/_install  \
-  -DASAN=ON                                     \
   -DDEBUG=ON                                    \
   -DMUST_BUILD_TOXAV=ON                         \
   -DSTRICT_ABI=ON                               \
   -DTEST_TIMEOUT_SECONDS=120                    \
   -DTRACE=ON                                    \
-  -DUSE_IPV6=$USE_IPV6                          \
-  $CMAKE_EXTRA_FLAGS
+  -DUSE_IPV6=$USE_IPV6
 
 export CTEST_OUTPUT_ON_FAILURE=1