MINOR: ssl: add pattern and ACLs 'ssl_c_sig_alg' and 'ssl_f_sig_alg'

ssl_c_sig_alg: client cert signature algo (string). Ex: "RSA-SHA1"
ssl_f_sig_alg: frontend cert signature algo (string). Ex: "RSA-SHA1"
diff --git a/doc/configuration.txt b/doc/configuration.txt
index 3cecf09..e41b1f1 100644
--- a/doc/configuration.txt
+++ b/doc/configuration.txt
@@ -8385,6 +8385,11 @@
   true if the value of the nth given entry value from the beginning/end of the
   DN matches the specified string.
 
+ssl_c_key_alg <string>
+  Returns true when the incoming connection was made over an SSL/TLS transport
+  layer, and the name of the algorithm used to generate the key of the
+  certificate presented by the client matches the string.
+
 ssl_c_s_dn <string>
 ssl_c_s_dn(entry[,occ]) <string>
   If no entry specified, returns true when the incoming connection was made
@@ -8401,6 +8406,11 @@
   layer, and the serial of the certificate presented by the client matches
   the value written in hexa.
 
+ssl_c_sig_alg <string>
+  Returns true when the incoming connection was made over an SSL/TLS transport
+  layer, and the name of the algorithm used to sign the certificate presented
+  by the client matches the string.
+
 ssl_c_verify <integer>
   Returns true when the incoming connection was made over an SSL/TLS transport
   layer, and the verify result matches the specified value (check man verify
@@ -8422,6 +8432,11 @@
   true if the value of the nth given entry value from the beginning/end of the
   DN matches the specified string.
 
+ssl_c_key_alg <string>
+  Returns true when the incoming connection was made over an SSL/TLS transport
+  layer, and the name of the algorithm used to generate the key of the
+  certificate presented by the frontend matches the string.
+
 ssl_f_s_dn <string>
 ssl_f_s_dn(entry[,occ]) <string>
   If no entry specified, returns true when the incoming connection was made
@@ -8438,6 +8453,11 @@
   layer, and the serial of the certificate presented by the frontend matches
   the value written in hexa.
 
+ssl_f_sig_alg <string>
+  Returns true when the incoming connection was made over an SSL/TLS transport
+  layer, and the name of the algorithm used to sign the certificate presented
+  by the frontend matches the string.
+
 ssl_f_version <integer>
   Returns true when the incoming connection was made over an SSL/TLS transport
   layer, and the version of the certificate presented by the frontend matches
@@ -9132,6 +9152,11 @@
                name ssl_c_i_dn(CN) and the second organization unit
                ssl_c_i_dn(OU,2).
 
+  ssl_c_key_alg
+               Returns the name of the algorithm used to generate the key of
+               the certificate presented by the client when the incoming
+               connection was made over an SSL/TLS transport layer.
+
   ssl_c_s_dn[(entry[,occ])]
                If no entry specified, returns the full distinguished name of
                the subject of the certificate presented by the client when
@@ -9148,6 +9173,11 @@
                when the incoming connection was made over an SSL/TLS transport
                layer.
 
+  ssl_c_sig_alg
+               Returns the name of the algorithm used to sign the certificate
+               presented by the client when the incoming connection was made
+               over an SSL/TLS transport layer.
+
   ssl_c_verify Returns the verify result errorID when the incoming connection
                was made over an SSL/TLS transport layer, otherwise zero if no
                error is encountered.
@@ -9169,6 +9199,11 @@
                name ssl_f_i_dn(CN) and the second organization unit
                ssl_f_i_dn(OU,2).
 
+  ssl_f_key_alg
+               Returns the name of the algorithm used to generate the key of
+               the certificate presented by the frontend when the incoming
+               connection was made over an SSL/TLS transport layer.
+
   ssl_f_s_dn[(entry[,occ])]
                If no entry specified, returns the full distinguished name of
                the subject of the certificate presented by the frontend when
@@ -9185,6 +9220,11 @@
                when the incoming connection was made over an SSL/TLS transport
                layer.
 
+  ssl_f_sig_alg
+               Returns the name of the algorithm used to sign the certificate
+               presented by the frontend when the incoming connection was made
+               over an SSL/TLS transport layer.
+
   ssl_f_version
                Returns the version of the certificate presented by the frontend
                when the incoming connection was made over an SSL/TLS transport