More logs for acra_proxy, acra_server, acra_configui

[vixentael]

Made logging for acra_proxy, acra_server, acra_configui more user-friendly.

0. Add custom logging format for acra_configui.
1. Suggest using error codes to differentiate errors.
2. Use error codes for most logs.
3. Add more info/debug logs.
4. Unify logs language.

[vixentael]

Uh oh, looks like pq library was recently updated.

Will wait until we fix this

[vixentael]

add mutex into logger (https://github.com/cossacklabs/acra/pull/135/files#diff-fe1e6f43a54f4d403e7b3af8a389c9f8R147) to fix errors like

fatal error: concurrent map writes

goroutine 212 [running]:
runtime.throw(0x4285320, 0x15)
	/usr/local/Cellar/go/1.9.1/libexec/src/runtime/panic.go:605 +0x95 fp=0xc42039da10 sp=0xc42039d9f0 pc=0x402baa5
runtime.mapassign_faststr(0x4244fa0, 0xc42007cd80, 0x4282370, 0x8, 0xc4200f8040)
	/usr/local/Cellar/go/1.9.1/libexec/src/runtime/hashmap_fast.go:607 +0x4f5 fp=0xc42039da90 sp=0xc42039da10 pc=0x400f0f5
github.com/cossacklabs/acra/logging.AcraJSONFormatter.Format(0x4399b80, 0xc42008e520, 0xc42007cd80, 0xc4205840f0, 0x0, 0xc42039db98, 0x402ad16, 0x4290020, 0xc42039dba8)
	/Users/hdf/go/src/github.com/cossacklabs/acra/logging/log_formatters.go:143 +0x86 fp=0xc42039db20 sp=0xc42039da90 pc=0x42027e6
github.com/cossacklabs/acra/logging.(*AcraJSONFormatter).Format(0xc42008e540, 0xc4205840f0, 0x411cacd, 0xc420020000, 0xc42039dc10, 0x411acaa, 0xc42009416c)
	<autogenerated>:1 +0x60 fp=0xc42039db78 sp=0xc42039db20 pc=0x4203c00

[vixentael]

add continue(commit) to fix memory address errors like:

ERRO[2018-03-28T11:05:55Z] can't accept new connection (connection=<nil>)  error="accept unix /tmp/unix_socket_6006: use of closed network connection"
panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x30 pc=0x778cdc]

goroutine 20 [running]:
main.(*SServer).Start(0xc4201c2180)
	/home/user/go_path_1.10/src/github.com/cossacklabs/acra/cmd/acraserver/listener.go:180 +0x22c
created by main.main
	/home/user/go_path_1.10/src/github.com/cossacklabs/acra/cmd/acraserver/acraserver.go:294 +0x15cf
.

[vixentael]

meantime:

1. i have added more logs into integration.sh script to see exactly go version and database that is being tested
2. enable verbose logging for tests.py (link
3. fix test TestNoCheckPoisonRecord by changing log lines and putting them into correct place (one, two)
4. switch into plaintext setting for logs by default, because otherwise circle ci builds sometimes logs are frozen. will investigate this issue later.