- Remove dep on crypto module
- Use core implementation

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#### Type Of Change
- [ ] Small bug fix (non-breaking change which fixes an issue)
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#### Checklist:
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- [ ] PR should be backported to stable branches
- [x] Tested changes locally
- [x] Related to issue #4353 

#### Description
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Replace module dependency by core implementation of sha1.

Test by placing a call between two clients.

Tests also were done with using `compute_sha1()` but not used in the PR to 
produce the exact `hash_data` as before even though the output of it is 
correct. 

Hex printing probably differs due to non-terminated c strings? 

Review is of course welcome.

``` c
Aug 13 13:31:01 app01 sbin/kamailio[3472802]: ERROR: {1 20855 INVITE 
0342509280954d73a42f8311573dee99} rtpengine [rtpengine.c:4573]: 
select_rtpp_node_new(): Using SHA1 hash for callid 
0342509280954d73a42f8311573dee99
Aug 13 13:31:01 app01 sbin/kamailio[3472802]: ERROR: {1 20855 INVITE 
0342509280954d73a42f8311573dee99} rtpengine [rtpengine.c:4581]: 
select_rtpp_node_new(): SHA1 hash for callid 0342509280954d73a42f8311573dee99 
is 2d0c1780 (as hex) old way
Aug 13 13:31:01 app01 sbin/kamailio[3472802]: ERROR: {1 20855 INVITE 
0342509280954d73a42f8311573dee99} rtpengine [rtpengine.c:4583]: 
select_rtpp_node_new(): SHA1 hash for callid 0342509280954d73a42f8311573dee99 
is *Ÿ#035eÊ#036@¤Û˜ûÄãº:‚'_Æ„ (as string) old way
---# Using `compute_sha_raw()`
Aug 13 13:31:01 app01 sbin/kamailio[3472802]: ERROR: {1 20855 INVITE 
0342509280954d73a42f8311573dee99} rtpengine [rtpengine.c:4589]: 
select_rtpp_node_new(): SHA1_raw hash for callid 
0342509280954d73a42f8311573dee99 is bd167410 (as hex) new way
Aug 13 13:31:01 app01 sbin/kamailio[3472802]: ERROR: {1 20855 INVITE 
0342509280954d73a42f8311573dee99} rtpengine [rtpengine.c:4595]: 
select_rtpp_node_new(): SHA1_raw hash for callid 
0342509280954d73a42f8311573dee99 is *Ÿ#035eÊ#036@¤Û˜ûÄãº:‚'_Æ„ (as string) 
new way
```

Logs for usage of `compute_sha1()`.

``` c
# They produce correct sha1 as string
Aug 13 13:31:01 app01 sbin/kamailio[3472802]: ERROR: {1 20855 INVITE 
0342509280954d73a42f8311573dee99} rtpengine [rtpengine.c:4599]: 
select_rtpp_node_new(): SHA1 hash for callid 0342509280954d73a42f8311573dee99 
is bd167410 new way
Aug 13 13:31:01 app01 sbin/kamailio[3472802]: ERROR: {1 20855 INVITE 
0342509280954d73a42f8311573dee99} rtpengine [rtpengine.c:4605]: 
select_rtpp_node_new(): SHA1 hash for callid 0342509280954d73a42f8311573dee99 
is 2a9f1d65ca1e40a4db98fbc4e3ba3a82275fc684 new way
```
You can view, comment on, or merge this pull request online at:

  https://github.com/kamailio/kamailio/pull/4366

-- Commit Summary --

  * rtpengine: Replace sha1 generation

-- File Changes --

    M src/modules/rtpengine/rtpengine.c (32)

-- Patch Links --

https://github.com/kamailio/kamailio/pull/4366.patch
https://github.com/kamailio/kamailio/pull/4366.diff

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