Fix no cdr after restart

[kosza]

Pre-Submission Checklist

• Commit message has the format required by CONTRIBUTING guide
• Commits are split per component (core, individual modules, libs, utils, ...)
• Each component has a single commit (if not, squash them into one commit)
• No commits to README files for modules (changes must be done to docbook files
  in doc/ subfolder, the README file is autogenerated)

Type Of Change

• Small bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds new functionality)
• Breaking change (fix or feature that would change existing functionality)

Checklist:

• PR should be backported to stable branches
• Tested changes locally
• Related to issue #XXXX (replace XXXX with an open issue number)

Description

dialog: fix to get CDRs after restart

The problem is that if kamailio is restarted during a call the cdr would not be created. 

The run_load_callbacks() should be called after acc module was loaded.
The acc module will setup DLGCB_LOADED type callback. So run_load_callbacks() should be delayed and run only once, the child_init(PROC_MAIN) is perfect for it.

version: kamailio 5.1.4 (x86_64/linux)
flags: STATS: Off, USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS, DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MEM, SHM_MMAP, PKG_MALLOC, Q_MALLOC, F_MALLOC, TLSF_MALLOC, DBG_SR_MEMORY, USE_FUTEX, FAST_LOCK-ADAPTIVE_WAIT, USE_DNS_CACHE, USE_DNS_FAILOVER, USE_NAPTR, USE_DST_BLACKLIST, HAVE_RESOLV_RES
ADAPTIVE_WAIT_LOOPS=1024, MAX_RECV_BUFFER_SIZE 262144, MAX_LISTEN 16, MAX_URI_SIZE 1024, BUF_SIZE 65535, DEFAULT PKG_SIZE 8MB
poll method support: poll, epoll_lt, epoll_et, sigio_rt, select.
id: unknown
compiled on 15:11:36 Jul 20 2018 with gcc 7.3.0

[miconda]

Thank for digging into it and coming with a fix.
Can you reformat the commit message so it matches the contributions guide:

• https://github.com/kamailio/kamailio/blob/master/.github/CONTRIBUTING.md#commit-message-format

So, the it should be like:

dialog: fix to get CDRs after restart

[more details here]

If you don't get the chance to do it soon, no worries, I can apply the patch manually, just have it in mind for future pull requests. It makes life easier by merging with one click here, instead of editing/patching source manually.

[miconda]

Pushed manually a different path to run the callbacks in child_init() with rank PROC_INIT instead of PROC_MAIN -- the first is executed when modules are initialised. Should you get any issues with this, open a bug report and it will be revisited.