r1262 merge: if a subrequest was finished and SSI was in middle of SSI command parsing and the command was a fast subrequest then the second subrequest output was just after first subrequest output and response part of main request between the subrequests went after the second subrequest.

# Copyright (C) Igor Sysoev


ngx_include="unistd.h";    . auto/include
ngx_include="inttypes.h";  . auto/include
ngx_include="limits.h";    . auto/include
ngx_include="sys/filio.h"; . auto/include