added git hash to version string

Makefile

@@ -65,7 +65,8 @@ LIBS += esphttpd
 # compiler flags using during compilation of source files
 CFLAGS		= -Os -ggdb -std=gnu99 -Werror -Wpointer-arith -Wundef -Wall -Wl,-EL -fno-inline-functions \
 		-nostdlib -mlongcalls -mtext-section-literals  -D__ets__ -DICACHE_FLASH \
-		-Wno-address -Wno-unused -DHTTPD_MAX_BACKLOG_SIZE=4096 -DADMIN_PASSWORD=$(ADMIN_PASSWORD)
+		-Wno-address -Wno-unused -DHTTPD_MAX_BACKLOG_SIZE=4096 -DADMIN_PASSWORD=$(ADMIN_PASSWORD) \
+		-DGIT_HASH='"$(shell git rev-parse --short HEAD)"'
 
 # linker flags used to generate the main object file
 LDFLAGS		= -nostdlib -Wl,--no-check-sections -u call_user_start -Wl,-static
@@ -196,7 +197,7 @@ libesphttpd/Makefile:
 	$(Q) [[ -e "libesphttpd/Makefile" ]] || echo -e "\e[31mlibesphttpd submodule missing.\nIf build fails, run \"git submodule init\" and \"git submodule update\".\e[0m"
 
 libesphttpd: libesphttpd/Makefile
-	$(Q) make -C libesphttpd USE_OPENSDK=$(USE_OPENSDK)
+	$(Q) make -C libesphttpd USE_OPENSDK=$(USE_OPENSDK) SERVERNAME_PREFIX="ESPTerm "
 
 $(APP_AR): libesphttpd $(OBJ)
 	$(vecho) "AR $@"