docs/libcurl: cleanups

- CURLINFO_TLS_SESSION.md: remove mention of NSS
- CURLINFO_TLS_SSL_PTR.md: remove NSS leftover
- CURLOPT_CAINFO.md: drop mention of backends not supporting this
- CURLOPT_CAPATH.md: wolfSSL also supports this

Closes #13166

docs/libcurl/opts/CURLINFO_TLS_SESSION.md

@@ -69,8 +69,8 @@ int main(void)
 
 # AVAILABILITY
 
-Added in 7.34.0. Deprecated since 7.48.0 and supported OpenSSL, GnuTLS, and
-NSS only up until this version was released.
+Added in 7.34.0. Deprecated since 7.48.0 and supported by OpenSSL and GnuTLS
+only up until this version was released.
 
 # RETURN VALUE
 

docs/libcurl/opts/CURLINFO_TLS_SSL_PTR.md

@@ -63,10 +63,6 @@ the active ("in use") SSL connection, with the following underlying types:
 
 **gnutls_session_t**
 
-## NSS
-
-**PRFileDesc ***
-
 ## OpenSSL
 
 CURLINFO_TLS_SESSION(3): **SSL_CTX ***

docs/libcurl/opts/CURLOPT_CAINFO.md

@@ -79,9 +79,7 @@ int main(void)
 
 # AVAILABILITY
 
-For the SSL engines that do not support certificate files the
-CURLOPT_CAINFO(3) option is ignored. Schannel support added in libcurl
-7.60.
+Schannel support added in libcurl 7.60.
 
 # RETURN VALUE
 

docs/libcurl/opts/CURLOPT_CAPATH.md

@@ -67,8 +67,7 @@ int main(void)
 
 # AVAILABILITY
 
-This option is supported by the OpenSSL, GnuTLS and mbedTLS (since 7.56.0)
-backends.
+This option is supported by the OpenSSL, GnuTLS, mbedTLS and wolfSSL backends.
 
 # RETURN VALUE