clean up start time and t_startsingle use so that redirect_time works properly

RELEASE-NOTES

@@ -6,10 +6,11 @@ Curl and libcurl 7.12.3
  Available curl_easy_setopt() options:     121
  Number of public functions in libcurl:    46
  Amount of public web site mirrors:        13
- Number of known libcurl bindings:         27
+ Number of known libcurl bindings:         28
 
 This release includes the following changes:
 
+ o -w time_redirect and num_redirects
  o no longer uses libcurl.def for building on Windows, OS/2 and Netware
  o builds on Windows CE
  o request retrying, --retry and family added
@@ -18,6 +19,7 @@ This release includes the following changes:
 
 This release includes the following bugfixes:
 
+ o CURLINFO_REDIRECT_TIME works
  o building with gssapi libs and hdeaders in the default dirs
  o curl_getdate() parsing of dates later than year 2037 with 32 bit time_t
  o curl -v when stderr is closed wrote debug messages to the network socket
@@ -34,6 +36,7 @@ Other curl-related news since the previous public release:
  o pycurl 7.12.2: http://pycurl.sf.net/
  o TclCurl 0.12.2: http://personal1.iddeo.es/andresgarci/tclcurl/english/
  o libcurl.NET 1.1: http://www.seasideresearch.com/downloads.html
+ o RCurl 0.5.1: http://www.omegahat.org/RCurl/
 
 This release would not have looked like this without help, code, reports and
 advice from friends like these: