more help for subject, and generate man page from detailed-help

Makefile.am

@@ -50,6 +50,7 @@ yubico-piv-tool.1: $(yubico_piv_tool_SOURCES) \
 		$(top_srcdir)/configure.ac
 	$(HELP2MAN) --no-info \
 		--name="Yubico PIV tool" \
+		--help-option="--detailed-help" \
 		--output=$@ $(top_builddir)/yubico-piv-tool$(EXEEXT)
 
 # Maintainer rules.

cmdline.ggo

@@ -31,11 +31,12 @@ option "action" a "Action to take" values="version","generate","set-mgm-key","re
 option "slot" s "What key slot to operate on" values="9a","9c","9d","9e" enum optional
 option "algorithm" A "What algorithm to use" values="RSA1024","RSA2048","ECCP256" enum optional default="RSA2048"
 option "new-key" n "New authentication key to use" string optional
-option "pin-retries" - "Number of retries before the pin code is blocked" int optional
-option "puk-retries" - "Number of retries before the puk code is blocked" int optional
+option "pin-retries" - "Number of retries before the pin code is blocked" int optional dependon="puk-retries"
+option "puk-retries" - "Number of retries before the puk code is blocked" int optional dependon="pin-retries"
 option "input" i "Filename to use as input, - for stdin" string optional default="-"
 option "output" o "Filename to use as output, - for stdout" string optional default="-"
 option "key-format" K "Format of the key being read/written" values="PEM","PKCS12" enum optional default="PEM"
 option "password" p "Password for decryption of private key file" string optional
 option "subject" S "The subject to use for certificate request" string optional
+         details="The subject must be written as /CN=host.example.com/OU=test/O=example.com/\n"
 option "pin" P "Pin code for verification" string optional