CLEANUP: contrib/prometheus-exporter: typo fixes for ssl reuse metric

A typo I identified while having a look to our metric inventory.
(s/frontent/frontend)

(cherry picked from commit 1e3697635292b0f194171958a26766ae3e8d8453)
[wt: actually it fixes a real issue as the typo was user-visible]
Signed-off-by: Willy Tarreau <w@1wt.eu>
(cherry picked from commit 2e50e5d1ea9b3af6cb87c52f23c6fc7b0e140b37)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>
(cherry picked from commit 152535c9816f5a4b73509bf557b316c4b61a2805)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>
diff --git a/contrib/prometheus-exporter/README b/contrib/prometheus-exporter/README
index 379dbc3..a688f10 100644
--- a/contrib/prometheus-exporter/README
+++ b/contrib/prometheus-exporter/README
@@ -122,7 +122,7 @@
 | haproxy_process_max_ssl_rate                   | Maximum observed number of SSL sessions per second.                           |
 | haproxy_process_current_frontend_ssl_key_rate  | Current frontend SSL Key computation per second over last elapsed second.     |
 | haproxy_process_max_frontend_ssl_key_rate      | Maximum observed frontend SSL Key computation per second.                     |
-| haproxy_process_frontent_ssl_reuse             | SSL session reuse ratio (percent).                                            |
+| haproxy_process_frontend_ssl_reuse             | SSL session reuse ratio (percent).                                            |
 | haproxy_process_current_backend_ssl_key_rate   | Current backend SSL Key computation per second over last elapsed second.      |
 | haproxy_process_max_backend_ssl_key_rate       | Maximum observed backend SSL Key computation per second.                      |
 | haproxy_process_ssl_cache_lookups_total        | Total number of SSL session cache lookups.                                    |
diff --git a/contrib/prometheus-exporter/service-prometheus.c b/contrib/prometheus-exporter/service-prometheus.c
index 291155d..9852206 100644
--- a/contrib/prometheus-exporter/service-prometheus.c
+++ b/contrib/prometheus-exporter/service-prometheus.c
@@ -484,7 +484,7 @@
 	[INF_MAX_SSL_RATE]                   = IST("max_ssl_rate"),
 	[INF_SSL_FRONTEND_KEY_RATE]          = IST("current_frontend_ssl_key_rate"),
 	[INF_SSL_FRONTEND_MAX_KEY_RATE]      = IST("max_frontend_ssl_key_rate"),
-	[INF_SSL_FRONTEND_SESSION_REUSE_PCT] = IST("frontent_ssl_reuse"),
+	[INF_SSL_FRONTEND_SESSION_REUSE_PCT] = IST("frontend_ssl_reuse"),
 	[INF_SSL_BACKEND_KEY_RATE]           = IST("current_backend_ssl_key_rate"),
 	[INF_SSL_BACKEND_MAX_KEY_RATE]       = IST("max_backend_ssl_key_rate"),
 	[INF_SSL_CACHE_LOOKUPS]              = IST("ssl_cache_lookups_total"),