[PATCH] Allow the CURL user agent to be specified either by config option http.useragent or by the environment variable GIT_USER_AGENT.

["Spencer E. Olson" <olsonse@umich.edu>]

Necessary to get through some firewalls that do not allow but the most common 
User-Agent strings.

---
 http.c |   10 +++++++++-
 1 files changed, 9 insertions(+), 1 deletions(-)

diff --git a/http.c b/http.c
index 1320c50..abee89e 100644
--- a/http.c
+++ b/http.c
@@ -41,6 +41,7 @@ static long curl_low_speed_time = -1;
 static int curl_ftp_no_epsv;
 static const char *curl_http_proxy;
 static char *user_name, *user_pass;
+static const char *user_agent = NULL;

 #if LIBCURL_VERSION_NUM >= 0x071700
 /* Use CURLOPT_KEYPASSWD as is */
@@ -196,6 +197,9 @@ static int http_options(const char *var, const char 
*value, void *cb)
        return 0;
    }

+   if (!strcmp("http.useragent", var))
+       return git_config_string(&user_agent, var, value);
+
    /* Fall back on the default ones */
    return git_default_config(var, value, cb);
 }
@@ -279,7 +283,10 @@ static CURL *get_curl_handle(void)
    if (getenv("GIT_CURL_VERBOSE"))
        curl_easy_setopt(result, CURLOPT_VERBOSE, 1);

-   curl_easy_setopt(result, CURLOPT_USERAGENT, GIT_USER_AGENT);
+  if (user_agent != NULL)
+     curl_easy_setopt(result, CURLOPT_USERAGENT, user_agent);
+  else
+     curl_easy_setopt(result, CURLOPT_USERAGENT, GIT_USER_AGENT);

    if (curl_ftp_no_epsv)
        curl_easy_setopt(result, CURLOPT_FTP_USE_EPSV, 0);
@@ -379,6 +386,7 @@ void http_init(struct remote *remote)
    set_from_env(&ssl_capath, "GIT_SSL_CAPATH");
 #endif
    set_from_env(&ssl_cainfo, "GIT_SSL_CAINFO");
+   set_from_env(&user_agent, "GIT_USER_AGENT");

    low_speed_limit = getenv("GIT_HTTP_LOW_SPEED_LIMIT");
    if (low_speed_limit != NULL)
-- 
1.7.1.1