[core] 'struct log_error_st' -> 'log_error_st'
[core] 'struct log_error_st' -> 'log_error_st'

typedef redefinitions may cause issues with older compilers

(The intention behind the decls and defines were done to reduce the
 number of unrelated lines modified for the transition to fdlog_st)

x-ref:
  https://trac.macports.org/ticket/63667
  https://github.com/macports/macports-ports/pull/12658

gstrauss/lighttpd1.4,gstrauss/lighttpd1.4,lighttpd/lighttpd1.4,lighttpd/lighttpd1.4,lighttpd/lighttpd1.4,gstrauss/lighttpd1.4,gstrauss/lighttpd1.4,gstrauss/lighttpd1.4,lighttpd/lighttpd1.4,gstrauss/lighttpd1.4,lighttpd/lighttpd1.4,lighttpd/lighttpd1.4