fix: increase max post body size
fix: increase max post body size

fixes #559

scality/S3,scality/S3,lucisilv/Silviu_S3-Antidote,lucisilv/Silviu_S3-Antidote,truststamp/S3,truststamp/S3,tomateos/S3,truststamp/S3,tomateos/S3,scality/S3,lucisilv/Silviu_S3-Antidote,lucisilv/Silviu_S3-Antidote,tomateos/S3,tomateos/S3,lucisilv/Silviu_S3-Antidote,lucisilv/Silviu_S3-Antidote,tomateos/S3,truststamp/S3,truststamp/S3,scality/S3,scality/S3,truststamp/S3,scality/S3,tomateos/S3,tomateos/S3,scality/S3,lucisilv/Silviu_S3-Antidote,truststamp/S3,scality/S3,lucisilv/Silviu_S3-Antidote,tomateos/S3,truststamp/S3