switch from log to tracing

I think this is a big improvement in readability.

I removed the `lnav` config, which is a little sad, but I don't think it
supports this structured logging format well. Still seems worthwhile on
balance.

server/Cargo.lock

@@ -1069,6 +1069,15 @@ version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3e2e65a1a2e43cfcb47a895c4c8b10d1f4a61097f9f254f183aee60cad9c651d"
 
+[[package]]
+name = "matchers"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8263075bb86c5a1b1427b5ae862e8889656f126e9f77c484496e8b47cf5c5558"
+dependencies = [
+ "regex-automata",
+]
+
 [[package]]
 name = "md-5"
 version = "0.10.5"
@@ -1133,12 +1142,12 @@ dependencies = [
  "failure",
  "futures",
  "libc",
- "log",
  "nom",
  "serde",
  "serde_json",
  "slab",
  "time 0.1.45",
+ "tracing",
 ]
 
 [[package]]
@@ -1157,9 +1166,7 @@ dependencies = [
  "hashlink",
  "itertools",
  "libc",
- "log",
  "moonfire-base",
- "mylog",
  "nix",
  "num-rational",
  "odds",
@@ -1176,6 +1183,8 @@ dependencies = [
  "tempfile",
  "time 0.1.45",
  "tokio",
+ "tracing",
+ "ulid",
  "url",
  "uuid",
 ]
@@ -1189,6 +1198,7 @@ dependencies = [
  "bpaf",
  "byteorder",
  "bytes",
+ "chrono",
  "cursive",
  "failure",
  "fnv",
@@ -1204,7 +1214,6 @@ dependencies = [
  "moonfire-base",
  "moonfire-db",
  "mp4",
- "mylog",
  "nix",
  "nom",
  "num-rational",
@@ -1227,6 +1236,12 @@ dependencies = [
  "tokio-tungstenite",
  "toml",
  "tracing",
+ "tracing-core",
+ "tracing-futures",
+ "tracing-log",
+ "tracing-subscriber",
+ "tracing-test",
+ "ulid",
  "url",
  "uuid",
 ]
@@ -1259,16 +1274,6 @@ version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "96a1fe2275b68991faded2c80aa4a33dba398b77d276038b8f50701a22e55918"
 
-[[package]]
-name = "mylog"
-version = "0.1.0"
-source = "git+https://github.com/scottlamb/mylog#71bbb14fc8d6047b37e2275027cfa96535f9c556"
-dependencies = [
- "chrono",
- "libc",
- "log",
-]
-
 [[package]]
 name = "ncurses"
 version = "5.101.0"
@@ -1304,6 +1309,16 @@ dependencies = [
  "minimal-lexical",
 ]
 
+[[package]]
+name = "nu-ansi-term"
+version = "0.46.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "77a8165726e8236064dbb45459242600304b42a5ea24ee2948e18e023bf7ba84"
+dependencies = [
+ "overload",
+ "winapi",
+]
+
 [[package]]
 name = "num"
 version = "0.4.0"
@@ -1425,6 +1440,12 @@ version = "1.17.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6f61fba1741ea2b3d6a1e3178721804bb716a68a6aeba1149b5d52e3d464ea66"
 
+[[package]]
+name = "overload"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b15813163c1d831bf4a13c3610c05c0d03b39feb07f7e09fa234dac9b15aaf39"
+
 [[package]]
 name = "owning_ref"
 version = "0.4.1"
@@ -1664,6 +1685,9 @@ name = "regex-automata"
 version = "0.1.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6c230d73fb8d8c1b9c0b3135c5142a8acee3a0558fb8db5cf1cb65f8d7862132"
+dependencies = [
+ "regex-syntax",
+]
 
 [[package]]
 name = "regex-syntax"
@@ -1922,6 +1946,15 @@ dependencies = [
  "digest",
 ]
 
+[[package]]
+name = "sharded-slab"
+version = "0.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "900fba806f70c630b0a382d0d825e17a0f19fcd059a2ade1ff237bcddf446b31"
+dependencies = [
+ "lazy_static",
+]
+
 [[package]]
 name = "signal-hook"
 version = "0.3.14"
@@ -2093,6 +2126,16 @@ dependencies = [
  "syn 1.0.107",
 ]
 
+[[package]]
+name = "thread_local"
+version = "1.1.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3fdd6f064ccff2d6567adcb3873ca630700f00b5ad3f060c25b5dcfd9a4ce152"
+dependencies = [
+ "cfg-if",
+ "once_cell",
+]
+
 [[package]]
 name = "time"
 version = "0.1.45"
@@ -2261,6 +2304,84 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "24eb03ba0eab1fd845050058ce5e616558e8f8d8fca633e6b163fe25c797213a"
 dependencies = [
  "once_cell",
+ "valuable",
+]
+
+[[package]]
+name = "tracing-futures"
+version = "0.2.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "97d095ae15e245a057c8e8451bab9b3ee1e1f68e9ba2b4fbc18d0ac5237835f2"
+dependencies = [
+ "futures",
+ "futures-task",
+ "pin-project",
+ "tracing",
+]
+
+[[package]]
+name = "tracing-log"
+version = "0.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "78ddad33d2d10b1ed7eb9d1f518a5674713876e97e5bb9b7345a7984fbb4f922"
+dependencies = [
+ "lazy_static",
+ "log",
+ "tracing-core",
+]
+
+[[package]]
+name = "tracing-serde"
+version = "0.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bc6b213177105856957181934e4920de57730fc69bf42c37ee5bb664d406d9e1"
+dependencies = [
+ "serde",
+ "tracing-core",
+]
+
+[[package]]
+name = "tracing-subscriber"
+version = "0.3.16"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a6176eae26dd70d0c919749377897b54a9276bd7061339665dd68777926b5a70"
+dependencies = [
+ "matchers",
+ "nu-ansi-term",
+ "once_cell",
+ "regex",
+ "serde",
+ "serde_json",
+ "sharded-slab",
+ "smallvec",
+ "thread_local",
+ "tracing",
+ "tracing-core",
+ "tracing-log",
+ "tracing-serde",
+]
+
+[[package]]
+name = "tracing-test"
+version = "0.2.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3a2c0ff408fe918a94c428a3f2ad04e4afd5c95bbc08fcf868eff750c15728a4"
+dependencies = [
+ "lazy_static",
+ "tracing-core",
+ "tracing-subscriber",
+ "tracing-test-macro",
+]
+
+[[package]]
+name = "tracing-test-macro"
+version = "0.2.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "258bc1c4f8e2e73a977812ab339d503e6feeb92700f6d07a6de4d321522d5c08"
+dependencies = [
+ "lazy_static",
+ "quote",
+ "syn 1.0.107",
 ]
 
 [[package]]
@@ -2294,6 +2415,15 @@ version = "1.16.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "497961ef93d974e23eb6f433eb5fe1b7930b659f06d12dec6fc44a8f554c0bba"
 
+[[package]]
+name = "ulid"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "13a3aaa69b04e5b66cc27309710a569ea23593612387d67daaf102e73aa974fd"
+dependencies = [
+ "rand",
+]
+
 [[package]]
 name = "unchecked-index"
 version = "0.2.2"
@@ -2373,6 +2503,12 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "valuable"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "830b7e5d4d90034032940e4ace0d9a9a057e7a45cd94e6c007832e39edb82f6d"
+
 [[package]]
 name = "vcpkg"
 version = "0.2.15"