remove warning "maxopenconns is 0, default to 100"

[mmetc]

also don't store as pointer since value 0 is not useful

[github-actions]

@mmetc: There are no area labels on this PR. You can add as many areas as you see fit.

• /area agent
• /area local-api
• /area cscli
• /area appsec
• /area security
• /area configuration

Details

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[codecov]

Codecov Report

Attention: Patch coverage is 63.63636% with 4 lines in your changes missing coverage. Please review.

Project coverage is 49.71%. Comparing base (f130ce6) to head (59681ee).

Files	Patch %	Lines
pkg/database/database.go	50.00%	3 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3129      +/-   ##
==========================================
+ Coverage   49.68%   49.71%   +0.03%     
==========================================
  Files         322      322              
  Lines       37910    37909       -1     
==========================================
+ Hits        18837    18848      +11     
+ Misses      17227    17219       -8     
+ Partials     1846     1842       -4     

Flag	Coverage Δ
bats	38.37% <63.63%> (+0.02%)	⬆️
unit-linux	34.17% <100.00%> (+0.01%)	⬆️
unit-windows	28.85% <63.63%> (+<0.01%)	⬆️

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[sabban]

lgtm