docs: ndnsec man pages improvements

 * Add a "See Also" section to most pages
 * Streamline/clarify some sentences
 * Refresh a few examples

Change-Id: I3e0b62ad01c06faac632a120cde22a8da472426e
diff --git a/docs/manpages/ndnsec-sign-req.rst b/docs/manpages/ndnsec-sign-req.rst
index d17ff3c..c2a4b03 100644
--- a/docs/manpages/ndnsec-sign-req.rst
+++ b/docs/manpages/ndnsec-sign-req.rst
@@ -4,20 +4,16 @@
 Synopsis
 --------
 
-**ndnsec-sign-req** [**-h**] [**-k**] *name*
+**ndnsec sign-req** [**-h**] [**-k**] *name*
 
 Description
 -----------
 
-:program:`ndnsec-sign-req` generates a signing request for a key.
+Generate a signing request for a key and print it to the standard output in Base64
+encoding. Note that a signing request is essentially just a self-signed certificate.
 
-The signing request of a key is actually a self-signed certificate. Given the
-key's information, :program:`ndnsec-sign-req` looks up the key in the PIB.
-If such a key exists, a self-signed certificate for the key, i.e. its signing
-request, is written to the standard output in base64 encoding.
-
-By default, *name* is interpreted as an identity name, and the signing request
-will be generated for that identity's default key.
+By default, *name* is interpreted as an identity name, and the signing request is
+generated for that identity's default key.
 
 Options
 -------
@@ -26,47 +22,35 @@
 
    Interpret *name* as a key name, instead of an identity name.
 
-Example
--------
+Examples
+--------
 
 Create a signing request for an identity's default key::
 
-    $ ndnsec-sign-req /ndn/test/david
-    Bv0DAAc9CANuZG4IBHRlc3QIBWRhdmlkCANLRVkIEWtzay0xMzk2OTk4Mzg5MjU3
-    CAdJRC1DRVJUCAgAAAFFZ+ibohQDGAECFf0BeDCCAXQwIhgPMjAxNDA0MTYwMDIx
-    MDhaGA8yMDM0MDQxMTAwMjEwOFowKjAoBgNVBCkTIS9uZG4vdGVzdC9kYXZpZC9r
-    c2stMTM5Njk5ODM4OTI1NzCCASAwDQYJKoZIhvcNAQEBBQADggENADCCAQgCggEB
-    AKOhGgpUZXiUkaqgfcIvBKSw4wFcSMhBdXr45Tzh8hi8dv1plXKAV4YQLkjHhJqi
-    VTj8qGWkvaP0Kv/mkynaa2rPzUQ77wE1ydRIBUik62bXQa8SanJsV9ux99t9LBKq
-    MY4mtWgal48wFqwqRPNH4xq0yFACh28eaMCMpNvZd2Fh4gmDvQ5xU7sJTyRLt/Mc
-    mfYppDFGfzUP2nP8eQW5I9+L0DXMAAb4z8w1nXHs21xyPv0SSaJXgBH0ZdBwB++D
-    Eo5RLmcDdhFqN0f9Rlz06LVq+gLUC2M+N54jD5qUhPEdW5erY6pyYhq4Zv2B4lbK
-    Zgf2FWIB2iw0of4snf2SxDcCAREWOhsBARw1BzMIA25kbggEdGVzdAgFZGF2aWQI
-    A0tFWQgRa3NrLTEzOTY5OTgzODkyNTcIB0lELUNFUlQX/QEABe8tCY99uFTPyiNX
-    u/hUY96FGnfQx4usA2rCd+M4bkvsAwKQVlbBx1sDXsakvoHhLaCi+MTwHw17o+oG
-    mtPqklLjM8XS+gF+Lh+OyivJQixb8KR8tAtlGeLDoLU/kpgYv/xVhp8Q5ma0/T47
-    faI4Sn6bQP7YoWj+BdO3oZYthtq3MZPw2hl7wuTRMHNm5i3efnZyZdoPNMR2K43x
-    gH6ew1JbEQG7G6l5Q/jjnfT/oTtUeQzqWf2SSylAX+9xFZ9KG4+S6K7mYieBoqiA
-    0wHjvDS1cuIH2j6XveoUYapRjZXaEZqB/YoBwRqEYq2KVn/ol5knLM6FIISXXjxn
-    cIh62A==
+    $ ndnsec sign-req /ndn/test/david
+    Bv0BUAc5CANuZG4IBHRlc3QIBWRhdmlkCANLRVkICLe4LjaLILlwCAxjZXJ0LXJl
+    cXVlc3Q2CAAAAZBBKKWTFAkYAQIZBAA27oAVWzBZMBMGByqGSM49AgEGCCqGSM49
+    AwEHA0IABJxGmknWpDMKlPKO+xffd9b39bGilN2gTB8xkQ04L3rRgHuD8syFbHXT
+    Czht6djEg7YQuKtbQ1npa7lVS7N/KN8WYhsBAxwzBzEIA25kbggEdGVzdAgFZGF2
+    aWQIA0tFWQgIt7guNosguXAIBHNlbGY2CAAAAZBBJUwR/QD9Jv0A/g8yMDI0MDYy
+    MlQxODE1MDH9AP8PMjAyNDA3MDJUMTgxNTAxF0cwRQIgGewzD5ZXsu49hnB/pJ+V
+    RR8JJZf9v29T/cqoEpYbf7sCIQCMySY9yqs2NybIQMVJQsJceEbOFPSjWIc9bwye
+    7Ecuyw==
 
 Create a signing request for a particular key::
 
-    $ ndnsec-sign-req -k /ndn/test/david/ksk-1396913058196
-    Bv0DAAc9CANuZG4IBHRlc3QIBWRhdmlkCANLRVkIEWtzay0xMzk2OTEzMDU4MTk2
-    CAdJRC1DRVJUCAgAAAFFZ+mbhRQDGAECFf0BeDCCAXQwIhgPMjAxNDA0MTYwMDIy
-    MTRaGA8yMDM0MDQxMTAwMjIxNFowKjAoBgNVBCkTIS9uZG4vdGVzdC9kYXZpZC9r
-    c2stMTM5NjkxMzA1ODE5NjCCASAwDQYJKoZIhvcNAQEBBQADggENADCCAQgCggEB
-    ALS6udLacpydecxMRIfZeo74fxzpsITqaa/4UxD2FJ9lU4dtfiSSIOaRwAB/w0K/
-    AauQRq3Q1AiEocUsW2h8LmtcuF4Cj9TGAUD/1s3CISMwf9zwQ3ZhNIzN0IOsrpPA
-    TsHrbdwtOxrcFvXX4GnMLWgtvcSB52Cn68h/4AUiA1CG9/DOyCyA4EHiIkHBxh6B
-    TvAmw7SmNjr1ZBTYMaMAEV5/oLZCHzHRO+2fKdEttaWH3bz7iKVVS8u5ZxXcBs8g
-    ot55m7Xf6/TUk3qQXM1kM8wW04U+8n3jch1i7tD2T3c/OFKTT7AWndwcfbU99Z6C
-    FZ7fMsgRHxFNY8hCFZJvFFUCAREWOhsBARw1BzMIA25kbggEdGVzdAgFZGF2aWQI
-    A0tFWQgRa3NrLTEzOTY5MTMwNTgxOTYIB0lELUNFUlQX/QEAkA2DjqDq8pcAD579
-    PaGz3sybCMo2zyjAJvLCRRDPrjQfkublIvN3wGykfsYRKTPW/aDlZcgOtqn8+Qdo
-    tpL9PixqB7hPAZzelADB7Rrqw41p5VNJTzBuIzC6bCssMa8xb2VTGkw1oEtWb1vl
-    Dn+WWvmTNE/yTnSTjNXnTdLinBSA1HH4edkjvH9hTn5+DVyZlpZrTX2qRYcNZqdC
-    kgESIroeoFnp95NVmO+jtL/pKaJ53jh7pvpv7y8wOu28Qk6HuhwDUR186Y/TNNt4
-    hIc0NNDfvvyGgbDEGCMJ7/qOSt0qpJ2BxvPCb9S/bQD1odjGfP2F4ZA2S/JN2SYm
-    5gldDQ==
+    $ ndnsec sign-req -k /ndn/test/david/KEY/%BDA%0F%EE%F55%D8%F4
+    Bv0BUQc5CANuZG4IBHRlc3QIBWRhdmlkCANLRVkICL1BD+71Ndj0CAxjZXJ0LXJl
+    cXVlc3Q2CAAAAZBBLUzJFAkYAQIZBAA27oAVWzBZMBMGByqGSM49AgEGCCqGSM49
+    AwEHA0IABO99nylhohJt0WnKNiVj6G1XNYxEgM7ESNXcpwgWB7gyeNywzG5JMfDs
+    GBlPZ4C4kshOzzw8uu4qmwexNUROWBgWYhsBAxwzBzEIA25kbggEdGVzdAgFZGF2
+    aWQIA0tFWQgIvUEP7vU12PQIBHNlbGY2CAAAAZBBLCFq/QD9Jv0A/g8yMDI0MDYy
+    MlQxODIwMDb9AP8PMjAyNDA3MDJUMTgyMDA2F0gwRgIhANjJjB3OkFY1idr83rgc
+    jqusnrWe9kFs4Fai/GmteqDlAiEA3z0LYmLG0+k0Q1jLNzrZwKuVk+MUxtChXTUg
+    NKXukzg=
+
+See Also
+--------
+
+:manpage:`ndnsec-cert-gen(1)`,
+:manpage:`ndnsec-key-gen(1)`