GUACAMOLE-1911: Fixed some typo mistakes ("fullfill", "fullfilling", "cerficiate").

src/common-ssh/ssh.c

@@ -203,7 +203,7 @@ void guac_common_ssh_uninit() {
 /**
  * Callback for the keyboard-interactive authentication method. Currently
  * supports just one prompt for the password. This callback is invoked as
- * needed to fullfill a call to libssh2_userauth_keyboard_interactive().
+ * needed to fulfill a call to libssh2_userauth_keyboard_interactive().
  *
  * @param name
  *     An arbitrary name which should be printed to the terminal for the

src/guacd/man/guacd.8.in

@@ -104,7 +104,7 @@ command. Beware that the certificate for
 be the first certificate in the file.
 .TP
 \fB-C\fR \fICERTIFICATE FILE\fR
-Enables SSL/TLS using the given cerficiate file. Future connections to
+Enables SSL/TLS using the given certificate file. Future connections to
 this instance of
 .B guacd
 will require SSL/TLS enabled in the client (the web application). If

src/guacd/man/guacd.conf.5.in

@@ -145,7 +145,7 @@ command. Beware that the certificate for
 be the first certificate in the file.
 .TP
 \fBserver_certificate\fR \fB=\fR \fICERTIFICATE FILE\fR
-Enables SSL/TLS using the given cerficiate file. Future connections to
+Enables SSL/TLS using the given certificate file. Future connections to
 .B guacd
 will require SSL/TLS enabled in the client (the web application).
 .TP

src/protocols/rdp/channels/cliprdr.c

@@ -412,7 +412,7 @@ static UINT guac_rdp_cliprdr_format_data_request(CliprdrClientContext* cliprdr,
 /**
  * Callback invoked by the FreeRDP CLIPRDR plugin for received Format Data
  * Response PDUs. The Format Data Response PDU is sent by the RDP server when
- * fullfilling a request for clipboard data received via a Format Data Request
+ * fulfilling a request for clipboard data received via a Format Data Request
  * PDU.
  *
  * @param cliprdr