update comments and Byte alignment

[lancoLiu]

No description provided.

[codecov-commenter]

Codecov Report

Merging #764 (62eda52) into develop (cc8ccf6) will increase coverage by 0.02%.
The diff coverage is 66.66%.

❗ Current head 62eda52 differs from pull request most recent head 5123d93. Consider uploading reports for the commit 5123d93 to get more accurate results

@@             Coverage Diff             @@
##           develop     #764      +/-   ##
===========================================
+ Coverage    52.07%   52.09%   +0.02%     
===========================================
  Files          290      290              
  Lines        22732    22732              
===========================================
+ Hits         11837    11842       +5     
+ Misses        9288     9286       -2     
+ Partials      1607     1604       -3     

Impacted Files	Coverage Δ
bfe_balance/backend/bfe_backend.go	48.71% <ø> (ø)
bfe_balance/backend/health_check.go	63.52% <ø> (ø)
bfe_balance/bal_gslb/bal_gslb.go	27.01% <ø> (ø)
...bfe_cluster_conf/cluster_conf/cluster_conf_load.go	53.30% <66.66%> (ø)
bfe_http2/server.go	71.30% <0.00%> (ø)
bfe_spdy/server_conn.go	77.09% <0.00%> (ø)
bfe_spdy/frame_read.go	53.75% <0.00%> (+0.83%)	⬆️
...e_modules/mod_trust_clientip/mod_trust_clientip.go	43.58% <0.00%> (+3.84%)	⬆️

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