[PATCHv2 0/4] Implements the GIT_TRACE_CURL environment variable

This is the second version but in reality is the complete rewriting of the patches discussed here

$gmane/290520 $gmane/290521

Changes from V1

- introduced GIT_TRACE_CURL variable with its documentation
- changed the name of the temporary variable "i" in "w" in the helper routine
- used the c escape sequences instead of the hex equivalent
- dropped the previous GIT_DEBUG_CURL env var
- curl_dump and curl_trace factored out to a shared implementation
in http.c 

  
Elia Pinto (4):
  http.h: Add debug callback and helper routine for implementing     the
    GIT_TRACE_CURL environment variable in http.c
  http.c: implements the GIT_TRACE_CURL environment variable
  git.txt: document the new GIT_TRACE_CURL environment variable
  imap-send.c: introduce the GIT_TRACE_CURL enviroment variable

 Documentation/git.txt |  8 +++++
 http.c                | 98 ++++++++++++++++++++++++++++++++++++++++++++++++++-
 http.h                |  6 ++++
 imap-send.c           |  6 ++++
 4 files changed, 117 insertions(+), 1 deletion(-)