docs: rename manpages to *.5.md

Suffix the manpages accordingly to be placed in the correct manpage
folder during package installation.

Signed-off-by: Valentin Rothberg <rothberg@redhat.com>

docs/containers-certs.d.5.md

@@ -0,0 +1,28 @@
+% containers-certs.d(5)
+
+# NAME
+containers-certs.d - Directory for storing custom container-registry TLS configurations
+
+# DESCRIPTION
+A custom TLS configuration for a container registry can be configured by creating a directory under `/etc/containers/certs.d`.
+The name of the directory must correspond to the `host:port` of the registry (e.g., `my-registry.com:5000`).
+
+## Directory Structure
+A certs directory can contain one or more files with the following extensions:
+
+* `*.crt`  files with this extensions will be interpreted as CA certificates
+* `*.cert` files with this extensions will be interpreted as client certificates
+* `*.key`  files with this extensions will be interpreted as client keys
+
+Note that the client certificate-key pair will be selected by the file name (e.g., `client.{cert,key}`).
+An examplary setup for a registry running at `my-registry.com:5000` may look as follows:
+```
+/etc/containers/certs.d/    <- Certificate directory
+└── my-registry.com:5000    <- Hostname:port
+   ├── client.cert          <- Client certificate
+   ├── client.key           <- Client key
+   └── ca.crt               <- Certificate authority that signed the registry certificate
+```
+
+# HISTORY
+Feb 2019, Originally compiled by Valentin Rothberg <rothberg@redhat.com>

docs/containers-certs.d.md

@@ -1,34 +0,0 @@
-% containers-certs.d(5)
-
-# NAME
-containers-certs.d - Directory for storing custom container-registry certficates
-
-# DESCRIPTION
-A custom certificate for a container registry can be configured by creating a directory under `/etc/containers/certs.d`.
-The name of the directory must correspond to the `host:port` of the registry (e.g., `my-registry.com:5000`).
-
-## Directory Structure
-A certs directory can contain one or more CA roots (i.e., `.crt` files) and one or more `<client>.{cert,key}` cert pairs.
-If more than one root or pair is specified, they will be used in alpha-numerical order.
-
-```
-/etc/containers/certs.d/    <- Certificate directory
-└── my-registry.com:5000    <- Hostname:port
-   ├── client.cert          <- Client certificate
-   ├── client.key           <- Client key
-   └── ca.crt               <- Certificate authority that signed the registry certificate
-```
-
-### Creating Client Certificates
-A client certificate pair can be generated via `openssl`:
-
-```
-$ openssl genrsa -out client.key 4096
-$ openssl req -new -x509 -text -key client.key -out client.cert
-```
-
-# SEE ALSO
-openssl(1)
-
-# HISTORY
-Feb 2019, Originally compiled by Valentin Rothberg <rothberg@redhat.com>