.mailmap: combine more (email, name) to individual persons

I got more responses from people regarding the .mailmap file.
All added persons gave permission to add them to the .mailmap file.

Signed-off-by: Stefan Beller <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: stefanbeller

.mailmap

@@ -26,6 +26,8 @@ Bryan Larsen <[email protected]> <[email protected]>
 Cheng Renquan <[email protected]>
 Chris Shoemaker <[email protected]>
 Chris Wright <[email protected]> <[email protected]>
+Cord Seele <[email protected]> <[email protected]>
+Christian Stimming <[email protected]> <[email protected]>
 Csaba Henk <[email protected]> <[email protected]>
 Dan Johnson <[email protected]>
 Dana L. How <[email protected]> <[email protected]>
@@ -74,6 +76,7 @@ Johannes Schindelin <[email protected]> <[email protected]>
 Johannes Sixt <[email protected]> <[email protected]>
 Johannes Sixt <[email protected]> <[email protected]>
 Johannes Sixt <[email protected]> <[email protected]>
+John 'Warthog9' Hawley <[email protected]> <[email protected]>
 Jon Loeliger <[email protected]> <[email protected]>
 Jon Loeliger <[email protected]> <[email protected]>
 Jon Seymour <[email protected]> <[email protected]>
@@ -181,6 +184,7 @@ Simon Hausmann <[email protected]> <[email protected]>
 Stefan Naewe <[email protected]> <[email protected]>
 Stefan Naewe <[email protected]> <[email protected]>
 Stefan Sperling <[email protected]> <[email protected]>
+Štěpán Němec <[email protected]> <[email protected]>
 Stephen Boyd <[email protected]> <[email protected]>
 Steven Drake <[email protected]> <[email protected]>
 Steven Grimm <[email protected]> <[email protected]>