docs: provide more see also for cipher options

More cross references. Hide nroff errors.

Closes #11513

docs/cmdline-opts/ciphers.d

@@ -5,7 +5,7 @@ Arg: <list of ciphers>
 Help: SSL ciphers to use
 Protocols: TLS
 Category: tls
-See-also: tlsv1.3
+See-also: tlsv1.3 tls13-ciphers proxy-ciphers
 Example: --ciphers ECDHE-ECDSA-AES256-CCM8 $URL
 Added: 7.9
 Multi: single

docs/cmdline-opts/proxy-ciphers.d

@@ -10,3 +10,9 @@ See-also: ciphers curves proxy
 Multi: single
 ---
 Same as --ciphers but used in HTTPS proxy context.
+
+Specifies which ciphers to use in the connection to the HTTPS proxy. The list
+of ciphers must specify valid ciphers. Read up on SSL cipher list details on
+this URL:
+
+https://curl.se/docs/ssl-ciphers.html

docs/cmdline-opts/proxy-tls13-ciphers.d

@@ -7,14 +7,14 @@ Protocols: TLS
 Category: proxy tls
 Example: --proxy-tls13-ciphers TLS_AES_128_GCM_SHA256 -x proxy $URL
 Added: 7.61.0
-See-also: tls13-ciphers curves
+See-also: tls13-ciphers curves proxy-ciphers
 Multi: single
 ---
 Specifies which cipher suites to use in the connection to your HTTPS proxy
 when it negotiates TLS 1.3. The list of ciphers suites must specify valid
 ciphers. Read up on TLS 1.3 cipher suite details on this URL:
 
- https://curl.se/docs/ssl-ciphers.html
+https://curl.se/docs/ssl-ciphers.html
 
 This option is currently used only when curl is built to use OpenSSL 1.1.1 or
 later. If you are using a different SSL backend you can try setting TLS 1.3

docs/cmdline-opts/tls13-ciphers.d

@@ -7,14 +7,14 @@ Protocols: TLS
 Category: tls
 Example: --tls13-ciphers TLS_AES_128_GCM_SHA256 $URL
 Added: 7.61.0
-See-also: ciphers curves
+See-also: ciphers curves proxy-tls13-ciphers
 Multi: single
 ---
 Specifies which cipher suites to use in the connection if it negotiates TLS
 1.3. The list of ciphers suites must specify valid ciphers. Read up on TLS 1.3
 cipher suite details on this URL:
 
- https://curl.se/docs/ssl-ciphers.html
+https://curl.se/docs/ssl-ciphers.html
 
 This option is currently used only when curl is built to use OpenSSL 1.1.1 or
 later or Schannel. If you are using a different SSL backend you can try

src/Makefile.am

@@ -85,7 +85,7 @@ endif
 CLEANFILES = tool_hugehelp.c
 # Use the C locale to ensure that only ASCII characters appear in the
 # embedded text.
-NROFF=env LC_ALL=C @NROFF@ @MANOPT@ # figured out by the configure script
+NROFF=env LC_ALL=C @NROFF@ @MANOPT@ 2>/dev/null # figured out by the configure script
 
 EXTRA_DIST = mkhelp.pl \
  Makefile.mk curl.rc Makefile.inc CMakeLists.txt