Smtp quit 6591 v4

[catenacyber]

Link to ticket: https://redmine.openinfosecfoundation.org/issues/
https://redmine.openinfosecfoundation.org/issues/6591

Describe changes:

• smtp/ftp: refine protocol detection (with probing parser) on QUIT pattern

SV_BRANCH=OISF/suricata-verify#2788

#14399 with new logic preferring QUIT as SMTP unless it is on port 21 (thus FTP)

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 84.16%. Comparing base (3d80c7f) to head (26313fb).

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #14411      +/-   ##
==========================================
+ Coverage   84.15%   84.16%   +0.01%     
==========================================
  Files        1014     1014              
  Lines      262460   262472      +12     
==========================================
+ Hits       220869   220914      +45     
+ Misses      41591    41558      -33     

Flag	Coverage Δ
fuzzcorpus	63.19% <87.50%> (+<0.01%)	⬆️
livemode	18.73% <50.00%> (-0.01%)	⬇️
pcap	44.64% <87.50%> (+0.05%)	⬆️
suricata-verify	64.94% <87.50%> (+0.01%)	⬆️
unittests	59.24% <50.00%> (-0.01%)	⬇️

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[suricata-qa]

WARNING:

field	baseline	test	%
	SURI_TLPR1_stats_chk
.uptime	645	623	96.59%
	TREX_GENERIC_stats_chk
.decoder.unknown_ethertype	3	4	133.33%
.decoder.event.ethernet.unknown_ethertype	3	4	133.33%

Pipeline = 28587

[suricata-qa]

Information: QA ran without warnings.

Pipeline = 28591