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_cfgable.h

src/tool_doswin.c

src/tool_doswin.h

src/tool_msgs.c

src/tool_msgs.h

src/tool_sdecls.h

src/vc6curlsrc.dsp

src/version.h