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

buildconf

packages/Symbian/group/curl.mmp

src/Makefile.inc

src/Makefile.vc6

src/tool_doswin.c

src/tool_doswin.h

src/tool_easysrc.h

src/tool_getparam.c

src/tool_getparam.h

src/tool_help.c

src/tool_help.h

src/tool_helpers.c

src/tool_helpers.h

src/tool_main.c

src/tool_main.h

src/tool_operate.c

src/tool_operate.h

src/tool_operhlp.c

src/tool_operhlp.h

src/tool_panykey.c