mhttpd memory leak

[dd1]

I confirm that mhttpd has a memory leak. Grown from 23 Gbytes to 28 Gbytes in a few hours.                                                                                                     

  PID USER      PR  NI    VIRT    RES    SHR S  %CPU %MEM     TIME+ COMMAND                                                                                                         
20193 agdaq     20   0   10.8g   8.4g   2.4g S  14.9 13.3  34:52.19 feevb.exe                                                                                                       
 8669 agdaq     20   0 5062724 267716 203092 S   7.9  0.4   1102:41 fectrl.exe                                                                                                      
19227 agdaq     20   0   28.3g 975028  13072 S   7.9  1.5 901:22.17 mhttpd                                                                                                          

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K.O.

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[dd1]

address sanitizer identified two leaks: small leak in history reader, small leak in mhttpd http proxy. both fixed. K.O.

[dd1]

fix merged to develop. K.O.