1 dh file is enough for a demo

demo/m1/dh2048.pem

------BEGIN DH PARAMETERS-----
-MIIBCAKCAQEAhGuaclXVprw9pL9arpYLtbp9rleuCMDScWvgkO1XdyrXz8YNR528
-VYpGydoFi+W1NqEK66j9bjI/Y0TFqnJLMYOZvSZQQpmaBMIkwbT94e3EiOLbAnbk
-t0RCAQTiJn2bE2ZUF85E9CW4BSDOprLQthrBG3BdpncBoaQTJWZVrzEfB74YqDYW
-Gf4X3uiROx4vik2iMSVNHupfQosyEDwva9KBOVyoM0kW6WEwQFwTX+EUTKqHXEQI
-sewVZLX0Mr6y1k2SIB64esD4Gw/ifiqovWgZREeqWv6oquCuDBnJMyBJE39Qz1Rs
-FthZgMpZ78qyy7ubbtmRW/61P3tL678eywIBAg==
------END DH PARAMETERS-----

demo/m1/re6stnet.conf

@@ -3,7 +3,7 @@ state m1/
 babel-pidfile m1/babeld.pid
 pp 1194 udp
 hello 4
-dh m1/dh2048.pem
+dh dh2048.pem
 ca ca.crt
 cert m1/cert.crt
 key m1/cert.key

demo/m2/dh2048.pem

------BEGIN DH PARAMETERS-----
-MIIBCAKCAQEAgSv57rfCSZQUAKOzgUYgBMOBsruY8MsGPtctms6r6ybjL7KZ7Fgt
-Lp+L3PW4dE06yQDqVoHSm/NtRJWMLHecj96zuuV646YkwN59v+elgpcdEM3LNbJe
-e+jlhCqWBUBQGLEPU/+dPD2alqCUaNkBPN9CHIqxmnnLGZgYw3egSjhJmEPzNZ9L
-OzKMpZ6dkMENLEykXTxQyH6cVQjZ5EvyNDPH0u1Yym7UEeZb2ACx4GNASohtdkhd
-9CCDkpFhf3SrqSF6Zk1TJ2WJPmI6fA4R1iknXX5lVECIkIb9xfeK5aGu3chjHc0P
-G6qVhhsKsHj84MqA3FCY9R/5vXFMDiv4gwIBAg==
------END DH PARAMETERS-----

demo/m2/re6stnet.conf

@@ -3,7 +3,7 @@ state m2/
 babel-pidfile m2/babeld.pid
 pp 1194 udp
 hello 4
-dh m2/dh2048.pem
+dh dh2048.pem
 ca ca.crt
 cert m2/cert.crt
 key m2/cert.key

demo/m3/dh2048.pem

------BEGIN DH PARAMETERS-----
-MIIBCAKCAQEAve7fDtJjI85vz2ZokBERbGNzBzp6ERUGKj4+JiRlkhO/GwJKcJXl
-07OAaeYJVI52hzMeKTnBVXtFSA8HifNNGDi2kiYTkhDOrn2ym7BU1skWlSkwpgAM
-qy+Z+UcgLs2QV9VVLd3S4mItViO1YonakjNFWSV2gfYPnCW6p579LhEVUakw7sc3
-4MyMyIyi9cf6OR0bi44c0nCl4KQSwc8YL9Ddw7ifrYSixvQVG+iEpcn404tf9XGA
-LKgc0FImmO1+zFqeHX8w93KBmwQSrqajX5MC92veKR1Vzivha/vrtXzC07CTL2xP
-PfUPybfDTNjvwLncGY7gbrbpc0pAkWZu6wIBAg==
------END DH PARAMETERS-----

demo/m3/re6stnet.conf

@@ -3,7 +3,7 @@ state m3/
 babel-pidfile m3/babeld.pid
 pp 1194 udp
 hello 4
-dh m3/dh2048.pem
+dh dh2048.pem
 ca ca.crt
 cert m3/cert.crt
 key m3/cert.key

demo/m4/dh2048.pem

------BEGIN DH PARAMETERS-----
-MIIBCAKCAQEA3rIqzFZ5OXzTreloUo0C0N/MNlWrZxfA0cHZbEeQ2gx14nW4aQX7
-tkhv4/t/ImBI1KpvgONzTf50IMOoQ7gJSO+scWPP9m0OQ/yzrnfM5efKA/YyCXoy
-AIdizEOEEMPIoU5QLfr6bFdtjCFUc87U12PKOMpPZNlGCOs1RC3llj5zkwvQclMe
-te+wZcdZWWLzykuwThs8ys+3iXsRiC7oxJpcny/mixfz5wkYAFBq56LdRM495Fro
-NaVybm/A5S+wqI9lpntGdHn5oi8FPlITP+A+WXM/pGjMybAwd8Nm56jIeMGSx4Cd
-kqTexwruxighubz0+FimbhDZidyJyOoRiwIBAg==
------END DH PARAMETERS-----

demo/m4/re6stnet.conf

@@ -3,7 +3,7 @@ state m4/
 babel-pidfile m4/babeld.pid
 pp 1194 udp
 hello 4
-dh m4/dh2048.pem
+dh dh2048.pem
 ca ca.crt
 cert m4/cert.crt
 key m4/cert.key

demo/m6/dh2048.pem

------BEGIN DH PARAMETERS-----
-MIIBCAKCAQEAkGcjnLnDvVVHGTwYcXt8EMD+eIStUKVefBw27hjH2LGuk0Sepf6F
-SSnmTaSnIwIiF61lN3qdoXgrZZIulC+kDUjdErY3ItGT+74lzCxm1yBfnaSelezq
-cLTc7sRLD9TcgGX7fd4TXAguX7UUOIEhFk68lZuEI2g1V+9Sd8N/PMtGV+oNXmsM
-cA2NoPcRVYBWr5w5mGFKk3gi8r2WmyQF6uWKGY4BbO4uowqzwoZoNUq9qjyp3DYf
-RxuR1rxK5Evwr5kj8TX2+OlbU4U544nAGFYIiFkQbA2TqSuQX199nwGzky4TI7n6
-GTGBBRea9fILjF3Pjs0dObnmLmJDRUj4ywIBAg==
------END DH PARAMETERS-----

demo/m6/re6stnet.conf

@@ -3,7 +3,7 @@ state m6/
 babel-pidfile m6/babeld.pid
 pp 1194 udp
 hello 4
-dh m6/dh2048.pem
+dh dh2048.pem
 ca ca.crt
 cert m6/cert.crt
 key m6/cert.key

demo/m7/dh2048.pem

------BEGIN DH PARAMETERS-----
-MIIBCAKCAQEAinUKim9F8gE69fcDMlIVBcrmBhiRtZ0OgKh1TGfRrLkyOXf8EHZ0
-L2DvzB6S7Q1RGysvW85TF3fbNwYLHZZ8l+1XkCVY7Z7+RzMyCqwKL+Salzwak/z4
-+p/7xHKgm/K+eGJ30BWKuLrV+Am/uXRX7joSyi5jJoeJPv+WrIjUkWxzwBO3ICnv
-G1rtMPheJEYdsQqGrxMNOdBg99p3+UwTD2RSdVUx/7EyHxKG09g7K/kLG1+0ZlA2
-hOZ2/xmA5+A2OTQD+gVa/mEa7idA5jmKeLxtE9WxbWfFK61FsQQheDzRJ7p5q6JE
-JSpZ2xxqPGUFfYbKucRL/5tkG8Vzc1h9AwIBAg==
------END DH PARAMETERS-----

demo/m7/re6stnet.conf

@@ -3,7 +3,7 @@ state m7/
 babel-pidfile m7/babeld.pid
 pp 1194 udp
 hello 4
-dh m7/dh2048.pem
+dh dh2048.pem
 ca ca.crt
 cert m7/cert.crt
 key m7/cert.key

demo/registry/re6stnet.conf

@@ -2,7 +2,7 @@ log registry/
 state registry/
 babel-pidfile registry/babeld.pid
 hello 4
-dh registry/dh2048.pem
+dh dh2048.pem
 ca ca.crt
 cert registry/cert.crt
 key registry/cert.key