curl tool: reviewed code moved to tool_*.[ch] files

packages/Symbian/group/curl.mmp

src/Makefile.inc

src/Makefile.vc6

src/main.c

src/tool_binmode.c

src/tool_binmode.h

src/tool_formparse.c

src/tool_formparse.h

src/vc6curlsrc.dsp